Yamaha R1 (2007) DUAL V.A.L.E.™ M-2 Slip-On Exhaust Systems:Yamaha’s R1 has caused quite a stir since its introduction. If you thought people were impressed with the bike before, wait until they see it with a Two Brothers Racing exhaust system installed on it. Our Dual system will reduce weight, increase torque & horsepower and dress up the look of your bike with this dual canister slip-on high performance exhaust system exclusively from Two Brothers Racing.Designed and built with painstaking care and attention to detail, Two Brothers Racing is proud to release our Dual M-2 Slip-on exhaust system for the 2007 Yamaha R1, available with either aluminum, titanium or high-temp carbon fiber canisters.Click here for slip on instructions.