94006 vs 94106
Senior Member
Joined: Feb 2008
Posts: 1,733
Likes: 0
From: Western NC
There are many who have cut the rears off, and not had any problems with the CEL coming on, and the post cat 02's only monitor catalyst efficiency, they have no control over mileage, power, etc, they are just a OBDII monitor. If they do come on, it is likely a high mileage vehicle that could use new 02's anyway, or you can buy($50+) or make($10) a set of MIL elims and take care of the CEL.
well ive done some askin around and pretty sure as long as you have some sort of converter on there you wont have to worry about a fine...my 2 cats are gutted and im not even close to an emissions county so all we have is a visual check (and most places dont even do that) but your computer shouldnt be hurt as long as you have cats between the sensors and as mac4.6 said and i would do the same thing (and i know no shops will do it for you not sure why but hey who knows) i would cut all 4 (somehow) and just replace the 2 you need with hi flows if your worried about the heat thing might just have to go with the 12" bodys instead of the 9" i think theres no real point in 4 cats on a truck i understand your takin care of your truck and i dont blame you at all...but if you take the 2 rear cats off and replace them with hi flows imo your just wastin money id rather see you replace the cats you need with hi flows and no rear cats or just cut the rear cats and leave the factory cats on however you can and i agree with sawin them off and buying about 3' of 2.5" straight pipe and welding it on yourself
Correct. Well i've decided im cutting the rears. Should be done some time next week. I'll buy the pipes and clamps to do the project. Not going to weld though, going to clamp it all so I can reverse it if needed, but yep I agree with you all its got cats, huge pre-cats
Camcorder goes with me whenever any exhaust related thing is done. I'm anxious to hear the added volume myself, and hoping for just a tiny ounce of drone. Magnaflows a party outside but too stock feeling inside But I love the sound.
I never really cared for side swept style. Out the back side exit i've always loved the looks on especially on 4wd trucks.
