2007-08 Yamaha YZ250F and 2007-08 Yamaha WR250 V.A.L.E.? M-7 Complete Exhaust Systems (Titanium Piping): With the patented use of Magnesium, titanium, aluminum and stainless steel, and hours of testing we have come up with an exhaust system to win races. Increased throttle response, more power throughout the powerband, and lighter weight all add up to a winning combination for your YZ250F or WR250. Designed and built with painstaking care and attention to detail, Two Brothers Racing is proud to release our M-7 titanium full exhaust system for the 2007 Yamaha YZ250F & WR250, available with either a titanium or high-temp carbon fiber canister.The Two Brothers M-7 off-road stainless/aluminum exhaust systems come complete with a U.S. Forestry Service approved removable screen type spark arrestor.