Ok guys I know this has been talked about on other forums but just so anyone who comes here knows. You don't always have to put an aftermarket intake in to improve your air intake. First off I have done this mod myself and believe it gave me better throttle response. Open the stock intake filter box. Remove the stock filter. When you look straight at the filter box from the front of the truck you will see a round tube at the bottom of the box that pulls air from inside the hole in the driver side fender well. Now take a dremel tool. If you don't know what this is its like a drill without a handle. Get a black & decker if you are getting a new one. I love mine and find many uses for it. Put a plastic cutt off wheel on your dremel and cut a long oval shape out of the top of this tube. The bigger piece you cut out the more air can flow freely through the filter. The way the stock box is set up the air has to take a very sharp angle out of one tube under the filter to get into the other end on the opposite side of the filter. This is a big bottleneck. Now that you have your cut out. Clean up any plastic pieces that are in the filter box. I stress to clean very well. I don't think you would want any plastic pieces getting sucked up into your engine. Now if you want put your stock filter back in the box and seal everything up. If you want to increase the flow even more. Pick up a aftermarket drop in filter. K&N or Fram Air Hog they are both great and have benifits besides better flow. They both are cleanable and last a very long time. This is a low level tech tip and any beginner could do this. Hope it helps you out.
http://www.clubtitan.org/downloads/intakemod1.jpg
http://www.clubtitan.org/downloads/intakemod2.jpg

M4ck

great idea m4ck, got a pic of this mod that you can post?

Good post, I sorta did the same thing shortly after I got my truck. I just removed the elbow section then took the Dremel and opened up the hole in the airbox.

great idea m4ck, got a pic of this mod that you can post?
Well of course since you ask. I will edit my first post and include them there. Wish I had taken step by step pictures but I didnt think about it while doing it. I will from now on.
M4ck

Great post!!! That is a great idea for us poor folks who can't afford $300-$500 for a new air intake. I think I will try this over the weekend.

I will give this a shot too!

Get back to this thread once you have done the mod. If the consensus is good, I too will do it. (Nice not being the ginny pig for a change!)

Best thing about this mod is, even if it is not much gain it is free gain. I love free. Especially since I don't get paid for overtime. LOL. I can tell you I definately felt a little bit better throttle response. I'm sure its no where near the amount that an aftermaket K&N or Volant would give you, but I believe if you added in a Hi Flow K&N or Fram Air Hog filter that you would get a really nice increase for the money. I know you can get the Fram Air Hog from Autozone for like $40.00 lot cheaper than 300 or more for the FIPK kits.
M4ck

Thats awesome M4ck. Its the simple things like that, that I would never think of doing. Thanks for savin' me 300 bucks bro!

Okay guys (BiXLL), I did the intake thing:

http://img79.exs.cx/img79/2927/AirBoxBefore.th.jpg (http://img79.exs.cx/my.php?loc=img79&image=AirBoxBefore.jpg)

After I removed the box, I saw I could trim off a little bit more:
http://img90.exs.cx/img90/4420/AirBoxTubes.th.jpg (http://img90.exs.cx/my.php?loc=img90&image=AirBoxTubes.jpg)

http://img90.exs.cx/img90/6631/AirBoxTubesCut.th.jpg (http://img90.exs.cx/my.php?loc=img90&image=AirBoxTubesCut.jpg)

After all the trimming, there's only about 4" of tube that the air squeezed through.
http://img90.exs.cx/img90/9321/AirBoxAfter.th.jpg (http://img90.exs.cx/my.php?loc=img90&image=AirBoxAfter.jpg)


I haven't noticed ALOT of difference, but I have noticed a little more/quicker throttle response. Thanks m4ck!! By the way, I didn't change from the factory filter yet, either.

Call me an old hard headed f*rt! I am happy with the way the truck runs. I can not see a reason to start cutting on it, and give the service guy a reason to say "ah-ha"!

Unless he pulls the filter he wont know.
M4ck

Mack, in looking at the pics of your modification I can't tell if you cut both side or just the side of the tube inside the air box. Can you please elaborate on your modification.

I just switched to Mobil 1 and hope that my mileage increases. I run mostly short around town trips of 6 to 8 miles each way and I've been averaging about 13.5 MPH, so any extra would help, especially here in Calif where we pay $2.25 for unleaded regular.

Stan
PS. Yes, I know, I wasn't buying a mini truck and didn't expect to get great mileage, but a little extra would be appreciated. And I keep my tires at 42lbs and that seems to help with very little deteriation in ride quality.

I only cut the part of the tube in the box. Firecracker and others took it a bit further and cut part of the snorkel that extends from the box into the wheel well.

Thanks for the reply. I think I'll start off with the inside cut and see what that does. I just got an Air Hog yesterday and also want to see how that helps.

Thanks for the reply. I think I'll start off with the inside cut and see what that does. I just got an Air Hog yesterday and also want to see how that helps.

Well, I got out my trusty Dremel and thought, oh what the heck. The plastic between the engine bay and the outside fender makes the air do a 90 degree turn, and that can't be helpful, so I cut that as well as the inside portion. So far I've taken a couple of short trips in town and it does feel like I have quicker throttle response and I love the sound when I step on the gas. what a great sound. Now if I can only keep my foot out of it, hahaha

I just cut the whole thing out and use gorilla glue to place a/c foam around the hole. Seems to seal to the fender fairly well.

This is some ghetto s$%#!

I did this after hearing from our resident tech that the tube comes out. I found the tube inside and the snorkel outside to be one peice that comes out, so I just cut it straight across with a hack saw. Unless a tech is really looking for a reason to deny something it looks normal with the straight cut.


Edited by Firecracker 6/3/05 1:24pm(added images) :wink:

Thats a much more dramatic cut than m4cks. How is it working out for ya?

works great from what I can tell, and less noticeable that it has been changed.

Awesome. Got me a little project scheduled for this weekend now.

:dance:

hardest part was getting the box out. Start by getting the lid out of the way, that will make it a ton easier, other than that it is a peice of cake.

That's exactly how I had done my box mod....just removed and whacked it with a sawzall. The inlet tube is only like $14 from Nissan if you ever want to put it back to stock. Be careful with the two tabs that hold the tube to the box...they can be somewhat of a pain to release.

Thanks much for the tips!

Did mine last night (with some online technical support from JPP - Thanks) :thumbsup:

I really can't say I've noticed anything yet. I also went and picked up a K&N drop in filter.

At this point, I'm just going to assume it's helping.

I did mine at first as M4ck did his and I had a bit of resonance. Then I read the post from NISTECH and seen what jaysplaypen did so I pulled it back out and re-did it. The resonance is now gone. At this time....but I'll wait a couple more gas tanks. I think I have gained back a little bit of the MPG loss that I got with the bigger wheels. I do the EXACT same driving each week. And the last two tanks I have been .3 MPG's higher then before the mod. I do think I have better throttle response...could be my imagination which is fine with me!!

looks like a worthwhile mod. However, I wouldn't cut the outside of the tube that looks like a velocity stack(in the fender) I'll tell you a story, and you decide. I had a 1989 Kawasaki ZX-7 (see avitar) and Muzzy (famouse bike tuner) did some testing on one because he was racing them. The stock airbox had two inlets. Both have a velocity stack type snorkel, like the Titan. Even though the opening was bigger without the snorkel, the bike lost 3 HP when the things were removed. Muzzy said that they smoothed and accelerated the air, so you got more flow with them in. I think the same thing goes for the Titan. If that velocity stack wasn't helping flow, I dont think Nissan would have put it there.

I did mine at first as M4ck did his and I had a bit of resonance.

Resonance... as in sound resonance?

Please pardon my ignorance.

Yes it made a very different sound. But now that I cut the entire tube most of it has gone other then the sound of pulling air.

Thanks for the clarification, Rossi.

Are you using the K&N drop in filter as well?

I'm a little scared of it because of the oil...I may look at other alternatives...I don't want to cause the MAF any harm and it's RIGHT THERE next to the filter.

Yeah... good point.

Uh oh....

How am I gonna know if I'm jacking up my MAF with the oil from the K&N?

post from NISTECH and master technician at Elk Grove Nissan.

Unoffical comment: Yes over oiling the filter will cause the aiflow to go out. An airflow meter typically goes out do to a foriegn material sticking to its heated element causing it to overheat and burn out the element.Regardless of weather the filter was oiled properly or not, If your vehicle has an oiled air filter some of the oil may still make it to the element. Since the elements being used today are much cheaper they are more suseptable to burning out. My recommendations on todays vehicle is to stay away from oiled filters altogether. There are good alternative that dont require the oil but are still washable.

Then response to the question of how to tell:

You will be able to tell initially by seeing a substantial difference in fuel milage for no appearant reason. Typically an improvement in fuel milage but it can go either way depending on how it fails. More severe symptoms wont start or wont idle or complete lack of power on hard accel.

How common is it, as far as titans go havent seen one yet but dont see to many titans with oiled air filters. Other models have seen it numourous times more on some models then others.

How did y'all get that bottom bolt off the air box?

Did you remove the windshield wiper reservoir or the headlight?

It's pretty tough to get to.

It's not really a bolt...it's just a push through. Just yank it out!!

No kidding! OMG!

Okay.... thx.

I was afraid to yank that thing off too man....

So what do I do about this filter? Just wait it out or essentially wipe my @ss with $60 and go get a different one?

Seems to me if it was going to be a problem you would have noticed something by now. Just be careful when you clean/recharge it.

If its working fine I'd leave it well enough alone... but that is just ME.

On the other hand, losing $60 as apposed to losing $300 (total guess for a MAF fix) may justify putting the original filter back in.

Whats this Air Hog I hear about? Does it have oil in it?

Got the mod done this weekend.

Sucks the air in much mo betta!!!

Thanks for all of your help!

Well I got the rotary tool out and altered the intake. I did not remove the box, just cut out the top area on the inside. I purchased a K&N drop in filter as well. You can hear the air sucking in more now with this setup. As for any performance/fuel economy I don't know yet. I will see next week after I fill it back up. Thanks for the tip!

I recently got the K&N drop in as well.

Man.... when I lay into the throttle it sounds tough!

Keeping the original filter handy so when the K&N needs to be recharged I can let it dry up real nice so it dont jack with the MAS when I put it back in.

It did give it a better sound by doing all that!! But now that I have the AEM...man this thing has alot more roar! I think my fuel milage is going to suck because I'm getting on it alot just to listen to it now!

But now that I have the AEM...man this thing has alot more roar!

Man I am JONESING to get an intake and exhaust!

In time.... in due time!

But now that I have the AEM...man this thing has alot more roar!

Man I am JONESING to get an intake and exhaust!

In time.... in due time!

Totally Jonesing for the AEM man...

Thanks guys for the ideas!
I took the whole tube out and left it out. I already had the K&N drop in but I did notice a difference. I used some A/c weather stripping to seal the box to the fender. I did this last week. This Monday I pulled the cover and filter off to check on the weather stripping.( want to make sure it was not getting sucked into the box) I found a plastic sandwich bag stuck to the filter. I think it is getting plenty of air through the fender wall. maybe one of the line workers left the sandwich bag in the fender but I really think it was road debris.

I just ordered the airaid TBS so I think with these two mods and the stock exhaust I should atleast get a boost in milage.
Anybody know what size replacement O ring I need so I do not have to butcher the one with screen?

I did this mod yesterday. When I drove it afterwards I didn't notice a lot of difference. This morning when leaving for work it was not on my mind but what reminded me of it was a little quicker throttle response when I started out. That being said, it does make a difference and it is FREE. Free is good.

BSJ. I have the K&N drop in filter if you want to buy it. I have the AEM now and don't need the K&N. You would just need to buy the cleaning detergent b/c I don't have any. PM if you're interested and I'll let it go cheap. I paid around $50 for it new.

For those of you that don't have a roto tool to do this with don't worry. The plastic is soft enough that a Utility Knife does the job perfectly!

I did it last night in about 10 minutes. 3 or 4 cuts in the same line in a U shape and a tap with the Utility knife and the piece popped right out.

I did it this way as I didn't want to worry about all those shavings from the rotozip tool shooting thru the Intake 8O

fIRECRACKER & Mack,

Do you think it makes any difference in 1, cutting the side that goes into the wheel well and 2nd I see some guys don't make the "U" cut they just whack of the whole inner piece with a hax saw. Any thoughts????

fIRECRACKER & Mack,

Do you think it makes any difference in 1, cutting the side that goes into the wheel well and 2nd I see some guys don't make the "U" cut they just whack of the whole inner piece with a hax saw. Any thoughts????

No, I don't really think there's a large enough difference there to notice.

can some body make a sound clip of this so that i will know what it will sound like. and where is the air silencer i want to remove that. and can you hear the sound when your diving down the road.what does it sound like,like a blow off valve.or just a shooows :? please help me out im so cunfussed

you can just hear air sucking in when you gun it.
I cant tell just going down the road but then again Ive got dual 40 series Flowmasters.

I did this mod about a month ago. At first I didn't really notice much but maybe slightly better throttle response and a noticeable change in tone. However, over the last three tanks of gas I have noticed about a 1.5 mpg increase. I'm not sure if this mod had much to do with it or if it's the cooler weather but now I can run 430-450 miles on a tank of gas when earlier I could barely get over 400. My last tank I got 18.6 mpg!!! I'm hoping with a K&N or AirHog I can break 19mpg.

when i got the K&N i rose up a whole 3MPG,i just want some more sound from my beast.

i wish i were an oscar myer wienner..............

cuz that wasnt random... lol!

i just did the mod and the engine doesnt sound nearly as restricted as before, like response is a bit quicker

Sorry guys...old thread, but I was wondering did anyone reset the ECU (if necessary) after they circumcized their air box?

Thanks

I havent and I modded my box last summer.

I might do the reset sometime just for the hell of it.

Doing the airbox mod and saw the post about reset the ECU? How do you reset the ECU and do you actually have to reset it after doing this mod.

Go to the how to section and it shows you how to reset the ECU.

It is recommeded...after a reset it makes a couple big adjustments....but then on it will only try to make very slight adjustments if I understand it right. So to quicker get the truck were it wants to be a reset is recommended.....

I reset mine for the heck of it...and I think for awhile after a reset it has more power.

I think I might have to do this.

I did this mod about a month ago. At first I didn't really notice much but maybe slightly better throttle response and a noticeable change in tone. However, over the last three tanks of gas I have noticed about a 1.5 mpg increase. I'm not sure if this mod had much to do with it or if it's the cooler weather but now I can run 430-450 miles on a tank of gas when earlier I could barely get over 400. My last tank I got 18.6 mpg!!! I'm hoping with a K&N or AirHog I can break 19mpg.

You use more gas in colder weather, not less.

Over at Titantalk one of the mechanical engineers said the length of that tube, in the air box, is that long for a reason. He said you get a water spray that comes in from the wheel well when driving on wet pavement, and the long tube stops that water from hitting the filter element and lets it drip in the boxes bottom recessed groove. The last thing you want to have happen is getting a paper filter element wet. Some argued that Nissan did it to reduce noise, but he disagreed stating Nissan engineers knew what they were doing.

Over at Titantalk one of the mechanical engineers said the length of that tube, in the air box, is that long for a reason. He said you get a water spray that comes in from the wheel well when driving on wet pavement, and the long tube stops that water from hitting the filter element and lets it drip in the boxes bottom recessed groove. The last thing you want to have happen is getting a paper filter element wet. Some argued that Nissan did it to reduce noise, but he disagreed stating Nissan engineers knew what they were doing.


They may have designed it that way, but, you should really not get water spray back behind that fender well cover anyway....I would think. And, if you did.....how would that water that came in though the tube get past the filter element to "let it drip in the boxes bottom recessed groove"?

Thanks for the info...maybe he should come over here and do some explaining as well. LOL

You're missing the point, you don't want water droplets hitting the filter element, it will collapse it. Someone else over at Titantalk said he ordered an XE wheel well to prevent a water spray from getting past the wheel well, something that the XE wheel well plastic is different than the SE or LE. Just go there and do a search on intake modifications. Anyway, after reading all the posts about cutting the in box tube, I decided to leave it as stock due to their comments...good luck.

Oh I see. Well, to each his own. I've had no issues and I don't use a paper filter.

Thanks for your input.

thats wat the tech at the dealership told me wen i ask'd him about it.....go figure...



"everyone is a mechanic or just play 1 on the internet"

I recently did this, along with adding an AmsOil air filter, and WOW!!!

I reset the ECU, but it needs more. I"m going to perform the Throttle Adjustment as well. Seems the ECU is okay, but the truck doens't like the throttle repsonse...??

Anyway, this and the AmsOil, laong with my Banks, and the beast is ALIVE!!

Above 3K rpm's the Banks really comes alive!!!

I did this mod yesterday, after doing a bit of research. The biggest reason was that when I pulled my airfilter there was only one spot that was dirty right at the end of the tube. Thats very inefficient if you ask me.

I cut mine with a kitchen knife and heated it with a propane torch. Cut like butter with no shavings to clean up. Took maybe 10 minutes.

Could care less about the numbers, but I think using the whole filter will decrease the resistance across the filter and increase flow and make the intake more efficient and therefore the motor more efficient.

I did this mod yesterday, after doing a bit of research. The biggest reason was that when I pulled my airfilter there was only one spot that was dirty right at the end of the tube. Thats very inefficient if you ask me.

I cut mine with a kitchen knife and heated it with a propane torch. Cut like butter with no shavings to clean up. Took maybe 10 minutes.

Could care less about the numbers, but I think using the whole filter will decrease the resistance across the filter and increase flow and make the intake more efficient and therefore the motor more efficient.

Bingo!


Good idea with the knife, too! :wink:

Oh yeah, and Welcome to THe Club! :D

I di mine. Dont know if it made a difference but hell made me feel better :P

I'm sure it does but does affect your warranty? And also does this give you any better gas mileage? And does it cause any added noise? If theres is more noise is it cool or anoying?

I'm sure it does but does affect your warranty? And also does this give you any better gas mileage? And does it cause any added noise? If theres is more noise is it cool or anoying?

Shouldn't effect your warranty, I would think.
Didn't notice any better mpg...if there is ANY, it'll be SMALL
Only added noise is when you punch it.....sounds like a Hoover Vacuum! 8O :D

I dont know about yall but my truck sounds so much better with this mod, before when i gunned her she sounded like she was trying to suck air through a straw, now she gets a full breath and sounds much deeper. i also went with the drop in K&N filter, its alright, wish i woulda went with the true flow filter though. anyways not sure if this mod makes a big difference in performance but it does help you appreciate these beast's more. sounds much better!!

Bump for a good looking mod!

I think I’m going to do this tomorrow morning, but I figure while I’ve got the air box open I might as well put in one of those fancy drop in filters :D

Anyone who’s done this mod, have you had a problem using an oiled filter, or are you using something different?

Bump for a good looking mod!

I think I’m going to do this tomorrow morning, but I figure while I’ve got the air box open I might as well put in one of those fancy drop in filters :D

Anyone who’s done this mod, have you had a problem using an oiled filter, or are you using something different?

I use the Fram AIRHOGG with no problems at all.

You need to watch the oiled air filters if you put too much oil then it will collect on the mass air flow meter & screw it up. Not a cheap fix.

I did this a month ago , put in KN drop in and no issues sounds good, but will have a peeled ear the next few wet drives!Also in 30000 miles when I recharge KN will definately let dry/soak..

Great idea, I think I'll do this mod this weekend along with the install of my PRG leveling kit. This mod should hold me over until I can afford a CAI.

Since alot people are concerned about the k&n and other oiled cotton air filters and the chance of damaging the MAF sensor, the factory Nissan air filters have oil on them. So as long as you don't soak the filter, you're all good. Figured i might help a few people sleep better at night.

Since alot people are concerned about the k&n and other oiled cotton air filters and the chance of damaging the MAF sensor, the factory Nissan air filters have oil on them. So as long as you don't soak the filter, you're all good. Figured i might help a few people sleep better at night.

Where did you find info about the OEM filter having oil on it? When I replaced mine with an Amsoil dry EAA-104, the OEM filter was dry imo. All OEM replacement paper filters, Fram, Delco, etc., are dry. The performance drop-ins are oiled, with Amsoil being the only exception.

You need to watch the oiled air filters if you put too much oil then it will collect on the mass air flow meter & screw it up. Not a cheap fix.

Wonder how much a fix would be?

The filters from the dealer come in a sealed plastic bag, inside a box, and after you open plastic, you can see the oil on it.

Q, as far as cleaning the oil off of the MAF sensor, some people have used electrical contact cleaner. I'm not sure how well it would work, but .....

The filters from the dealer come in a sealed plastic bag, inside a box, and after you open plastic, you can see the oil on it.

Q, as far as cleaning the oil off of the MAF sensor, some people have used electrical contact cleaner. I'm not sure how well it would work, but .....


So you have concluded that the factory paper air filter is sprayed or treated with oil because of the plastic bag. You do know other paper fiter brands are not wrapped in plastic and just packed in a box? I'm referring to OEM replacement filters for the Titan.

i have the sudden urge to do this mod....

i have the sudden urge to do this mod....I did to and did but not crazy about the sound. Its not that its to loud it just sounds strange,nothing like the deep sound you get from a cai, now I am trying to figure out a way to make it sound like it did before.

just buy the $15 piece at the stealer.

How strange to you mean. You could try and just remove the snorkle piece completely. I think Firecracker posted about that a long time ago.
m4ck

I did to and did but not crazy about the sound. Its not that its to loud it just sounds strange,nothing like the deep sound you get from a cai, now I am trying to figure out a way to make it sound like it did before.

I THOUGHT IT SOUNDED GREAT WITH the air box mod....

How strange to you mean. You could try and just remove the snorkle piece completely. I think Firecracker posted about that a long time ago.
m4ckHard to explain, it just doesnt have that deep sound I exspected.

I THOUGHT IT SOUNDED GREAT WITH the air box mod....

It does sound great. How can anyone dislike that Waaaaaaaa sound when punching it. The a is short for reference.

well.....after reading this thread. i decided it was something i wanted to do....so after a good cleaning(truck needed it after a week of rain)i had the afternoon off and decided to do it. pulled the whole box out and cut it flush like some did. i did happen to notice that even with only 6Kmiles on my truck that half my stock air filter was NASTY.... only half of it though. pulling the box out was easy. just yank, but getting the stack tube out of the box was royal PITA. took me longer to just get that out, then it did pulling the whole box, and putting it back in, and actually doing the cutting. ANYWAY, after i put it all back together, it was a quick shot down to PEPBOYS for a K&N filter. didnt notice a difference at all on the ride there with stock filter... not even a noise difference. didnt really step on it that much though. but after the filter ($35.00) it definetly made a difference. the sound is cool...and i dont know what the actually HP figures would be. maybe not much..but the "seat of my pants dyno" says i can feel the ponies. pulls harder and really snappy now. its weird cause i liked the power the truck had before,it wasnt a slug. but it seems to be a little more fun now. really wakens up my gibson dual swept back pipes. now i want a 2 degree advance and maybe reset my ECU very cool....and FREE(except for the filter) mod. even with the filter its a cheap mod. highly recommend.

I need to give this a shot

first off the guy at titan talk saying that was designed to keep water off of the filter is just talking out of his a55.it was designed as an intake silencer and that is it.unless you have no inner fenders on the truck water wont get to it.when the factory designes stuff it is a comprimise for sound and performance.the japs thought that us westerners would be annoyed by the intake sound.

i drove in some NASTY rain the other day. i was going 20mph on a straight away 55mph road cause i couldnt see...no problems. and even when it subsided enough for me to drive 55-65 i still had no problems what so ever. i have to say. that air box isnt all that big. and if its raining, and im hammering on it..any woter at the bottomon my air box it coming into my filter. a big v8 can suck some air. if guys are having problems gumming up up the MAS sensor with over oiling then you know that its sucking pretty hard.

Well... I just performed this mod. I just took my reciprocating saw and hacked it off about 1 1/2 inches from where the pipe enters the airbox... i too noticed that my air filter was VERY dirty on one side and the other side was REALLY clean... so for the mean time... i switch the filter around... and opened that pipe up... ill prob just drop in a k&n or airhog as well! I did sense a slight change in the crispness of the throttle response. hopefully with the K&N it will perform alot better and get better MPGs.

How strange to you mean. You could try and just remove the snorkle piece completely. I think Firecracker posted about that a long time ago.
m4ckI had a 04 that was built on monday morning,something just never sounded right when punching it.I have a 05 now that sounds completely different and I can see where this mod would sound good now.

Hey everyone ! :hi:

First, this is just my 2 c....that and a buck will get you a cup of coffee at most mcdonalds. I certainly don't claim to be an expert, but applying a little mechanical logic.......

a few points;
1. as far as the "dirty spot" on the air filter,... remember that the particles of dirt have more mass than the same volume of air going into the air box. The inlet air has the highest velocity when passing through the inlet nozzle tube. It then slows down as the air expands when it enters the filter box. The particles of dirt want to go straight, which is why they tend to land in one area, however air is more fluid and as it expands from the inlet nozzle it utilizes all of the filtration area that is required. Remember too, that the filter and filter housing are designed to handle the high air volumes required for highway speeds and the loads at the upper end of the engine's torque band. It's doubtful that we can enhance much at the lower end which is where we spend most of our driving time.

2. I seriously doubt that there is any mileage or performance improvement...UNLESS...you are spending a major part of your drive time at over 3800 rpm, or under heavy loads such as pulling heavy trailers.

3. Remember...as humans, and especially us guys, the sounds we hear affect our impressions of what's going on around us. In other words....if it sounds faster, it must be faster...right? sorry....
If you are only looking for the sound value, and this mod supply's that need, then this is a cheap way to get it.

4. I sure don't see a major downside AS LONG AS you are careful to cleanup any grinding chips. I would highly recommend that you remove the box to modify it. Never leave any kind of particulate in a location where it can be pulled downstream of the filter element.

5. A possible caveat to item #4 is this; rarely does a manufacturer add parts for no reason. There is ALWAYS a reason. In this case it might be as simple as noise control, however there is the possibility that the air inlet nozzle serves a function. such as air turbulence control, or inlet air velocity modifier, or....whatever.

Air always moves faster, more efficiently, and at higher volumes when the turbulence is lowest.

I still very much enjoy the sound of a well tuned engine, however I grew out of the need to hot rod several years ago...."well....mostly"

I have decided not to modify my air filter housing for those reasons above, although it's been very interesting reading all the comments...even the dumb ones.....:duh:

Have a great day all !

d

In the beginning, I also had your same thoughts, but that changed after careful consideration. The attached pics show the results, before and after. I'm very pleased to date with the mod. The sound level is probably 20% louder and that slight lag on initial acceleration is gone. Both filters were in for 5 months with similar mileage

I will acknowledge that the mod "may" allow for better dispersion of any particulate. I seriously doubt there has been any real impact on performance. There has probably only been a big impact on the butt dyno.

enjoy your mod.

This mod have been proven to work through track times. And I want to say someone dyno'd it.....but I'll have to find it first.

And I know some of you will say track times will vary. NOT if you are a consistent driver they will not. My last trip to the track all five of my times were only separated by hundredths of a second. Not tenths.

These last three posts are giving me de ja vue....

"This is like deja vu all over again."-- Yogi Berra

I just cut mine yesterday and dropped a oiled K&N filter in there and boy is there a difference! Its almost like its pulling to much air! i dont really hear and noise from it. maybe a little. i just pulled it out and cut it straight off. make sure you dont cut off the clips* haha but this is a mod i recommend to everyone!

Hey M4ck I Did This Yesterday And Got A Fram Drop In And It Really Does Work

ok so i did this mod...but now im wondering whether i screwed myself over with warranty issues??? when i go in for my first maintenece they are going to check the air filter...am i going to have and problems??

does this void warranty, cause for my first maintanence they are going to check the air filter and see this mod. i may be paranoid but i just want to be positive.

For those saying the long tube is there to stop water, Dont go get a CAI it dont have that long tube to stop the water... WOW seriously?

I modded my airbox about a week ago and my SES light has come on for the third time now? Did i take out to much? It seems to still run fine. I have a superchip coming today hopefully that will help the problem. Thanks in advance for your help.