At DMG Motorsports, we present the Yoshimura RS-4 Exhaust Quiet Insert (INS-17-K) — a genuine Yoshimura replacement part built to dial back the volume on your RS-4 muffler without giving up the performance character you built your exhaust system for. Designed specifically as a low-volume insert kit for Yoshimura RS-4 mufflers, this 1.5 in. insert is the perfect solution when your track, club, or local noise ordinance calls for a quieter setup. Whether you're heading to a sound-restricted event or just want a more neighbor-friendly ride, this insert kit installs into your existing RS-4 muffler to bring the decibel level down while keeping your Yoshimura exhaust in play.

Features:

• Genuine Yoshimura replacement Low-Volume Insert Kit engineered specifically for RS-4 mufflers
• 1.500" insert diameter for precise fitment into compatible RS-4 muffler applications
• Non-spark arrested design
• Available as an optional kit for applications requiring different sound restrictions, with decibel reduction depending on the specific application
• Kit includes low-volume insert tube, end-cap collar, and set screw for straightforward installation
• Designed to fit a standard equipped motorcycle as delivered from the factory
• Backed by Yoshimura's decades of racing and exhaust engineering expertise
• Ideal for riders needing to meet sound restrictions at tracks, events, or local regulations