Hi, guys. I just purchased my second porsche, a 2015 Cayenne S. The car is CPO. I like the car, but for 420 hp, it sounds weak. I am not able to easily find a good replacement exhaust for the S model (there are several for the base model, e.g., fabspeed, who said they werent sure if theirs would fit an S). Have any of you 958.2 Cayenne S owners out there replaced the stock exhaust with something you like? Also, any info on whether this would void CPO? Thank you.