2000 honda civic si
#5
RE: 2000 honda civic si
It improves the flow of exhaust from the engine, they are better than stock manifolds, and are best accompanied with a cat back exhaust and a high flow cat-converter, again, I'm not gonna try to sound like a know it all, just gonna add my two cents where I can.
#8
RE: 2000 honda civic si
Yes it is attached to the catalitic converter and there is only one. The other thing you are probably seeing is the resonator.. But a header is worthless if not accompanied by a test pipe/highflow cat and a catback exhaust system.. holla