Spark Force Full Exhaust System for Yamaha Fits:15-24 YZF R1 (stainless steel collector with Force Evo muffler) (GYA8881T) Detachable thermal liner for added

Detachable thermal liner for added warmth

a reminder of the adventures that await

Fully compatible with all oil types

These mufflers are designed to fit seamlessly onto stock head pipes

Spark Force Full Exhaust System for Yamaha Fits:15-24 YZF R1 (stainless steel collector with Force Evo muffler) (GYA8881T) Detachable thermal liner for addedSpark Force Full Exhaust System for Yamaha Take your Yamaha's performance to the next level with the Spark Force Exhaust System. Developed for top racing teams and tested on world famous tracks, this system delivers maximum power for both professional and amateur riders. You get the perfect balance of weight reduction, performance and pure racing sound. Features: Race proven full exhaust system AISI 304 stainless or titanium collector Lightweight