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|Titan Engine, Transmission & Drivetrain Technical discussion about the engine, transmission, and drivetrain.|
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Probably just bad cats man. If your truck is still running (holy crap look at those miles on an 07! You drive to China and back everyday??), then just 1: replace the cats on the manifold and b-pipes with some magnaflows of the same size. 2: Get LT headers and have some magnaflow cats welded ino the same spot as the cats in the b-pipes. Basically, you have a set of cats on the manifold and a set in the b-pipes. You do not need all 4 cats to pass emissions. (04-06 2wd's came with only 2 cats and was emissions safe). It would actually be cheaper for you to just get Longtube headers and use them to replace the OEM manifold/cat combo, then cut out the OEM cats in the b-pipes and weld in some Magnaflow cats. You can def get it done fore less then a grand
Well, 2x4 model's of that year have 2 cats, so you will be fine. The headers will have a bung for the primary (AFR) sensor's.. I suggest either the Stillen or Doug Thorely's...And out of those two I lean to the Doug Thorely's.
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