alright all new to this ,this is my first real post would a standard 1.5 civic (b pipe) be bad on a civic with a 1.8 sir engine with ITR cams, AEM intake ,and a SK2 intake Mani ,as would that exhaust make much of a difference to the performance of the motor if so I will change it as the pipe from the cat back to the back box is only a standard pipe of a 1.5 lsi so it prob only 1 and half inch in diameter maybe
cheers people
cheers people