WTK best piping size exhaust for 4g91
Posted: April 10th, 2012, 8:44 pm
i have ah 4g91 fuel injected A\T but i would like to know if i put extractors if to remain with the same stock size piping or go 2inch. i know if the piping too big the car would lose power as it is not a powerful engine so any advice ppl????