For the life of me I can't find the inlet size of the Greddy evo2 exhaust. I want to know if it is even worth getting a y-pipe along with this exhaust. If the inlet is 3in I may but if its smaller, most y-pipes are 3 in and it will cause a decrease in power.

I drive an 03.5 5AT sport. My only other mods is a k%n filter, z-tube and a plenum spacer. I also just ordered a stock lower and upper plenum do do the diy porting job on it.

evo

 

I believe the piping on the Evo2 is 2.5 all the way through. I'll double check later today if I get a chance.

 

If thats the case I would probably be better off this an HR y-pipe then. Thanks!

evo