Graves Motorsports Full Exhaust System Titanium for the Yamaha YZ450F 2006-2008 Description: Introducing Graves all new hand-made-in-the-USA Supermoto full titanium exhaust system for the 2008 Yamaha YZ450F. Big gains in horsepower and torque are achieved while eliminating 1.4 lbs of weight. This sytem features stainless steel spigot, aluminum flange, titanium head pipe, titanium mid pipe and titanium silencer with “VCV” technology. (Velocity Controlled Volume)Exhaust System WeightsGraves Full Exhaust System = 5.2 lbs. (-1.4 lbs.)Stock Full Exhaust System = 6.6 lbs.