grunyon

Quick question of what's the best size test pipe for me.

I'm running stock headers and exhaust. I plan on keeping it like that for a while. Should I get the 63mm or 70mm test pipe? I'm assuming one bigger than the size of my stock exhaust would hurt performance or does it not matter?

Thanks!

Gernby

You should get a 60 mm, instead of the 63 or 70. I believe Invidia might be the only source for a 60 mm, unless you find one on ebay.

vtec9

60, or 63 is fine. Some only make 63s.

jakescakes

As stated 60mm Invidia for stock exhaust setup. A tune along with the testpipe is highly recommended.