de-cat ?

[911mark911]

hi for all the Q's, but I have a chevy express 8.1L 2002 and just want to know if I can de-cat the exhaust and possibly go for a straight through system, to create a better and true sounding V8 sound

[LuS1fer]

Strictly speaking, you are supposed to have a cat but as long asi t passes the emissions test, you should get away with it. Yank engines tend to be quite clean. My friend's Z06 blew it's cats out and his straight-through exhaust passes.
Bear in mind they don't have a figure so use an exhaust Tapley meter (?) to test the levels.

[Upthejunction]

You just need to find a friendly MOT centre who is sympathetic to American cars

[911mark911]

hi thanks for the info, I think mot will be ok, my big concern is if there are any running issue's

[shovelheadrob]

My F150 has ad the guts removed from the cats as they were breaking up inside, it passed emissions test easily without.

[911mark911]

was there any issues with lambda sensors etc