I put a Banks Power exhaust on my 04 and let me tell you it was the best $600 I've ever spent. All you do is get the number off the web site and if you bull **** with the guy on the phone he'll go down to the shipping guy and push yours to front of the line.

If you have a differential locker on your truck it may be faulty, mine caused my rearend to go out. The parts are on back order for two months now and Nissan put me up in a F'n Kia Spectra or some crap. If your diff lock light does not come on and stay on the whole time its locked in you've got a problem,,, I just thaught thats the way it was supposed to be.

Good to know about the banks, mine has been on order since Jan. 12. I contacted Greg from Mossy, just under $500.00. He emailed me today saying that Banks broke a piece of machinery that makes the muffler. Now the exhaust won't ship until next week. Plus I am still waiting for the AEM intake to come available. Anyway hope your Titan starts to feel better.
Justin