GYTR® Ported Cylinder Head Assembly

Through extensive development, with flow bench dyno, and track testing, we achieved optimum power from our GYTR ported cylinder head. Once we perfected the head flow characteristics, we meticulously digitized the ports to obtain the precise dimensions needs for CNC machining. Unlike flow variations inherent in hand porting, CNC porting lets us accurately reproduce this maximized flow design with every cylinder head manufactured. Cylinder head comes as a ready-to-install assembly, with valve train and GYTR Performance Camshafts pre-assembled. Can be used with stock or GYTR performance piston. (GYT-5D305-00-00), sold separately. Used by the Yamaha Racing Team including 2009 ITP QuadCross Champion Dustin Nelson.

This accessory is restricted to closed-course competition only. See notes below.

• Fits '10-'11 YFZ450X & '09-'11 YFZ450R

Note: All YFZ450X and YFZ450R models are regulated by the EPA. Because this accessory affects emissions, using it constitutes illegal tampering punishable by law unless the vehicle is only used in closed-course competition. Note: This performance accessory does not meet California standards for off-road recreational vehicle usage.