Developed and used by Yamaha race teams, the kit offers professional-level performance while maintaining strict Yamaha durability standards. The head comes fully assembled and ready to install. Yamaha has developed two specific GYTR® Yamaha Power Tuner maps to optimize performance.

• Used by Yamaha race teams
• Increases horsepower and torque across the entire power curve?Fully assembled, adjusted and ready to install
• Designed for AMA-approved fuels (T4, Pro6)
• 15.4:1 Compression Ratio with GYTR® High Compression Piston Kit
• Machined GYTR® logo
• Highly recommend use with the GYTR® High Compression Piston Kit #B7B-E16A0-V0-00