hi
i have a 1991 civic vtec import.
i have fitted a induction kit and want to fit a custom exuast.
if i decat my civic will it effect the performance for bad or worse??
cheers

 

For better! But, it's not worth it as most people on this forum will tell you due to lack of mods, in other words if you had a turbo yea maybe then, but with an induction kit, and a decated pipe, its not worth polluting our pretty little world They also make high flo converters out there.