so go with 2.5 inch hell go with 4 inch if you want and don't worry about back pressure
4" is taking it a bit too far. That would rape the entire powerband (exhaust gas scavenging goes bye-bye
), and probably not fit under the car.
Even 2.75" is too far for an NA engine. If you're turbo like I'm assuming Seanscn is (he does have an AllTrac Hood
), then 3" will do fine, since scavenging isn't an issue anymore.
this newbie needs to get informed before he starts to talk shit, the kazuma is the loudest exhaust but not the best, tpr exhaust is the best, go search and learn before you talk, earn respect fool
Um, actually, Kazuma does make more power than TPR since it's a catback.
It gets rid of any restriction leftover in the exhaust system (besides the header). The TPR exhaust is only an axle back, so it still maintains the restriction of the 2.36" stock midpipe (even though the TPR exhaust uses 2.5"). Because of that restriction, though, the TPR has incredible low end (even better than TRD
), and its piping design helps give it the best high end. Adding TPR's upcoming midpipe to the exhaust will most likely make it equal to Kazuma, but much, much, much quieter.