94dB Spark Arrestor Insert - 4.1 RCT - Replacement 4-Stroke Exhaust Spark Arrestor Screen Insert

Evolution Exhaust - Carbon Fiber - YZF-R1 - Designed for riders that demand maximum performance from their motorcycle - Significantly lighter compared to the stock exhaust system and features exceptional production quality, hi-tech materials, and of course increased engine performance - Pure racing sound output - Different than the standard Evolution system - Headers include crossover and feature a different layout for a bigger race radiator - Link pipe does not contain fixing points for stock heat shield - Mufflers do not include db killers - Heat shields on the mufflers are made for racing - Mufflers do not accept stock heat shields - Cannot be mounted with stock fairings

Headpipe - Monster 821/1200 - Offers an upgrade to a full system when used with an Akrapovic Slip-On exhaust system - Accepts both stock heat shield and optional carbon heat shield - Stock valve system will be removed