I agree with Edo. I have listened to the RM, Comptech, and HKS, but none of them sound very "exotic" to me. The RM is loud, but it sounded more like a 4 cylinder imports such as the civic, integra, prelude...etc. Others sound very much like the Mustang and other American Muscle car. I'm looking for a exhaust that makes sound like Ferrari or F1 race cars..... I really like the sound of George's (Maomaonsx)except it was WWWAAAAYYYY too loud! Any suggestion?