...or you could make your exhaust not sound like ass pumped through an amplifier.
Actually, anything to help with the sound issue at tracks is good in my book. I'm probably going to have to find a way reduce exhaust sound from my car, especially once it's got turbo exhaust flow. I wonder if any of those superduper rice exhaust tips at Pep Boys have enough angle to do the same trick? If I go to these lengths to meet sound requirements, I want the mad street cred!