Yamaha R1 Slip-On (2004-06) - Dual M-2 TITANIUM V.A.L.E.™ canisters

Description: High performance exhaust system.

Yamaha R1 (2004-06) Slip-On Exhaust Systems: Our exclusive  V.A.L.E.™ mounting system eliminates the need for springs resulting a more secure mounting. Huge horsepower gain of 6.7hp @ 7500rpm (right where you can use the extra power) and a peak horsepower of 4.1hp @ 11,500rpm. Total peak horsepower leapt from 152.7hp to 156.8hp simply by installing the Twobros M2 slip-on exhaust system!