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I was just curious if anyone knows if it's possible to replace the cats on a 05 2wd without removing the manifolds...I have a 05 with about 115k miles on it and I've been throwing the 420 and 430 code for a while. I was going to swap out the o2 sensors but was told the cats would be the thing to change...I appreciate any help that you can offer...Thanks.
 

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You'll have to pull the manifolds because the catalytic converters are welded to the manifolds. Might as well put in headers.
 
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