For 3500-8500 RPM high performance engines. For racing use only. Extended Constant cross-section of runners. Great mid-range torque for short track power. Improved throttle response for 60 feet times. Direct line of sight flow path maximizes flow. CNC machined in critical areas for performance. Designed for23 degree standard port heads/ Runners have 2.80 square inch cross section.

Product Features:

• For 3500 to 8000 RPM High-Performance Engines
• Extended Constant Cross-Section of Runners
• Great Mid-Range Torque For Short Track Power
• Improved Throttle Response For 60 ft. Times
• Direct Line of Sight Flow Path Maximizes Flow