2026 Aprilia RS660 / Tuono 660 Exhaust Modification

custom exhaust modification service transforms your OEM exhaust into a proper underbody aftermarket exhaust for a fraction of the price.  We've spent many hours researching and experimenting and have come up with 3 different modification options that maintain the OEM underbody exhaust aesthetics, reduce weight, and add the deep-throaty sound of the twin motor. This is NOT simply exhaust Coring.  The OEM muffler has a series of chambers and piping that reduce sound, we re-route and modify the muffler internals for different sound output and better exhaust flow.     Shipping and Core exchange: We are currently working on stocking pre-fabricated exhausts. Please ask before ordering to check stock. We have ended our core exchange program  How it works: Buying Outright: Please call for availability we show stock but we are building to order at this time  Core Exchange: we are no longer offering the core exchange Mail-In Service: With this service you send in your OEM exhaust, we begin modif