Yo

[fmfkid250]

@99345hp

You know there is a correct way to size exhaust pipe right? I see you run a dyno, have you tested different exhaust sizes on your car?

I have read by many different sources that larger than needed exhaust pipe can actually hurt performance. Hot gases travel faster than cold gases. An oversized pipe will allow the gases to cool which will slow them down. A correctly sized exhaust will retain the heat inside the pipe which will keep the gas speed up, give you less backpressure and more power.

I have a turbo Civic. It doesnet like 3"