Ok my freind races a 92 civic. He got a header from someone for free to put on his car but it isn't race legal, I am pretty sure it would fit on my car but I am not sure what exactly it does, the only difference I can see is that it comes out in two pipes instead of 1, does that mean that you have to run dual exhaust? I was just wondering if putting this on my car would be worth the trouble, any input would be great.
No it doesnt mean you gave to do dual exhaust. It goes 4-2-1 pipe so its tuned to give you low-mid RPM torque unstead of high RPM torque basically.