Originally Posted by GS997S

I agree that Porsche dealers might treat aftermarket changes differently. But it is not up to the dealer to decide if a warranty claim will be honored. My dealer told me that when warranty claims are made, PCNA requires documentation of the repair, including photos. My dealer told me that if the car is not fully stock, the claim will be denied. Obviously, if your PCM fails, the dealer is not going to take a photo of your exhaust to send Porsche. But if you have any type of exhaust claim, they will want a photo and if they see the mod, they can and will most likely deny the claim.

I had a friend that had a GT3 RS who sold the car to someone in Texas. The new owner ended up with some type of engine seal issue. The car had a full aftermarket exhaust. The dealer told the new owner that Porsche would not honor the warranty claim on the engine repair with the modded exhaust. The original owner fortunately had all the OEM parts that he sent to the new owner who then converted the exhaust back to stock for the warranty claim to proceed.

In this case the dealer certainly cut the owner some slack. The dealer could have noted the exhaust mod in the vehicle history in the PCNA computer so that he would have been screwed. But he allowed the owner to put the car back to stock condition and then proceed with the warranty repair.