Graves Motorsports Yamaha YZ450F 2006-08 Full Exhaust System Titanium (For professional Racing Applications only)Description: Graves Motorsports hand-made-in-the-USA full exhaust system for the Yamaha YZ450F. Big gains in horsepower are achieved while eliminating 2 lbs of weight. This sytem features stainless steel spigot, aluminim flange, titanium head pipe, titanium mid pipe and titanium silencer. Exhaust System Weights:Graves Full Exhaust System = 5.0 lbs. (-2.0 lbs.)Stock Full Exhaust System = 7.0 lbs.