sanjay1988

machang i m not sure about figures regarding emissions but i ve got a high flow race cat made by zero sports on my sti and the turbo spools much faster and revs right through to the redline much harder. its less restrictive hence exhaust fumes exit much quicker. so it improves performance significantly prob around 10-15 bhp gain, however fuel consumption is significantly higher tho. oops this is darin by the way didnt realize i was using my friends log in