Okay, my friend has a wrx. he knows quite a bit about cars, but when it comes to something he doesn't know, he seems to act like an ass and TRIES to make you look bad. He's got a 3" exhaust, and he's putting a putting a 4" dp on...
To be blunt, what's bottlenecking? okay, and is 4" dp to a 3" exhaust bottlenecking? Would this be a good thing or a bad thing?
thank you
Bryan
To be blunt, what's bottlenecking? okay, and is 4" dp to a 3" exhaust bottlenecking? Would this be a good thing or a bad thing?
thank you
Bryan