performance catalytic converter cayenne high flow?
 

Is there a manufacturer that makes a set of performance catalytic converters for the 958 ctt cayenne with high flow?

Don't want the added noise of a performance cat back system and straight pipes are obnoxiously loud for daily driver.

Cargraphic makes some high flow cats (both primary and secondary). I have a set of secondary high flow cats on mine. It makes the car a bit louder without going all the way with the bypass.

http://www.cargraphicts.com/en/brand...haust-systems/