Yamaha Factory racing horsepower now available for our YXZ racers.The GYTR Race Cylinder Head Assembly comes fully assembled with REM-finished GYTR race camshafts and CNC-ported head for increased flow, providing ultimate performance and reliability

• Requires OEM cam gears (not included)
• Head surface decked for improved compression ratio from 11.5-12.5
• Stock valves, buckets, and springs are included for durability and easy maintenance
• Requires the use of the Power CommanderV by Dynojet Research, sold separately
• Designed to be used with additional GYTR accessories for the ultimate engine performance
• Requires use of minimum 112-octane racing fuel (if this head assembly is used without other engine modifications, 110-octane racing fuel can be used)