Upgrade your motorcycle's performance with the Yoshimura 234810D321 Rs 4 Header/Canister/End Cap Exhaust System. This premium exhaust system features a pentagonal-shaped muffler designed to maximize internal volume and improve exhaust flow. With a polyresonant duplex front chamber and a stepped, two-stage core baffle, this system enhances sound and performance. Additionally, it is compatible with spark arrestor/sound inserts for added versatility. Features: * Muffler Shape: Pentagonal-shaped muffler for improved airflow * Internal Volume: Maximized internal volume for optimal performance * Front Chamber: Polyresonant duplex front chamber for enhanced sound quality * Core Baffle: Stepped, two-stage core baffle for improved exhaust flow * Compatibility: Spark Arrestor/Sound Insert Compatible for customization options