Cayenne S Exhaust Sound Hack for $28
Using 2 straight pipes to bypass the muffler. Cost me $28 for both pipes.
However since I was lazy, it took me three attempts. What worked is 51mm diameter but it was a bit loose. Need to flange out the end. 63mm will fit the entrance but it will get smaller and smaller to about 54mm. Length of pipe is 400mm, but it can be to about 450mm