2014

M4 Yamaha R1 2009–2014 Undertail Slip-Ons (Carbon Fiber) The M4 Undertail Slip-Ons for the Yamaha R1 deliver a clean, aggressive look while enhancing sound and performance. Designed to mount in the factory undertail position, this system retains...

M4 Yamaha R1 2009–2014 CAT Eliminator Slip-On (Carbon Fiber) The M4 CAT Eliminator Slip-On for the Yamaha R1 is designed for riders looking to maximize performance and sound. By eliminating the catalytic converter, this system delivers a more...

M4 Yamaha R1 2009–2014 Undertail Slip-Ons (Titanium) The M4 Undertail Slip-Ons for the Yamaha R1 deliver a clean, aggressive look while enhancing sound and performance. Designed to mount in the factory undertail position, this system retains the...

M4 Yamaha R1 2009–2014 Undertail CAT Eliminator Slip-Ons (Titanium) The M4 Undertail CAT Eliminator Slip-Ons for the Yamaha R1 are built for riders seeking maximum performance and an aggressive undertail look. By eliminating the catalytic...

M4 Yamaha R1 2009-2014 CAT Eliminator Catalytic Converter Eliminator for the 2009–2014 Yamaha R1. Designed to fit stock mufflers and most aftermarket mufflers. Removing the catalytic converter increases exhaust flow, producing additional power...