For 4000 to 8000 PRM high-performance engines. Raised runners. Closely match port shape and location of heads. Best choice for classes that prohibit modification. Original 6 bolt pattern. 1 inch of additional carburetor pad height.

Product Features:

• For 4000 to 8000 RPM High-Performance Engines
• Raised Runners
• Closely Match Port Shape/Location Of Heads
• Best Choice For Classes That Prohibit Modification
• Original 6-Bolt Pattern
• 1 in. Of Additional Carb Pad Height