At DMG Motorsports, we present the Yoshimura RS-4 Exhaust Spark Arrestor Insert Kit, 1.375" (SA-08-K) — a genuine Yoshimura replacement part built to keep your off-road machine trail-legal without sacrificing the performance sound your RS-4 system was designed to deliver. Whether your bike's spark arrestor has worn out or you're adding one to an RS-4 muffler that wasn't originally equipped with a spark-arrestor insert, this kit gives you a direct, USFS-approved solution engineered specifically for Yoshimura's RS-4 off-road exhaust systems.

Features:

• Replacement USFS Approved Spark Arrester designed specifically for RS-4 Off-Road Mufflers
• Available as an optional Spark Arrester for applications not originally equipped with one
• Kit includes the Spark Arrester Insert, End-cap collar, and Set screw for a complete, ready-to-install package
• Sized for 1.375" RS-4 muffler applications; fits Yoshimura RS-4 slip-on and full exhaust systems
• Genuine Yoshimura part, MPN/SKU: SA-08-K (Yoshimura part reference 961-9026)
• Designed to fit a standard equipped motorcycle as delivered from the factory; please confirm fitment against Yoshimura's insert chart before ordering
• Helps keep your off-road ride compliant with U.S. Forest Service spark arrestor regulations for trail and public land riding

Fitment