That's because you CaT is an emission cleaner. lol. You're going to run heavy smoke, with a lot more smell. The Cat. also adds back pressure for your engine to keep it alive.

 

i know that,but im not gonna tune it for like another month,it should be ok right?another question,right now im running bpr6es ngk spark plugs,should i move up to bpr7es?

 

anyone?

 

buehler?

 

lol. yeah that smoke is a b!tch. Mine does that too. I have 3 inches straight back.. it'll leave black crap on your car too. And be prepared for the o2 sensor to go out.. like someone else said.. mine only took like 1 month after I put it on and it went out.. and I had my stuff put on last summer and stilll haven't had it tuned.. I'm planning on it this summer.. I'm gonna go with the Emanage.

 

Just as a fyi it a turbo the turbo controls backpressure. this is why you see turboed cars with dump pipes no backpressure from turbo back is needed.