YAMAHA YZ450F YZ 450F GYTR PORTED CYLINDER HEAD ASSEMBLY 1SLE11B0V000. GYTR® Ported Cylinder Head Assembly. CNC milling helps eliminate the variances that hand porting can produce. The head was developed on the flow bench in conjunction with dyno and track testing to ensure the ultimate in performance and durability. GYTR Performance Camshaft Kit is included, as well as stock valve train and cam gears for durability and easy maintenance. GYTR Head Assemblies are used by Yamaha SX/ MX and ATV Race Teams. This accessory is restricted to closed-course use. CALIFORNIA CUSTOMERS PLEASE READ. WARNING: This product can expose you to chemicals, including lead, which is known to the state of…