OEM quality cast aluminum alloy contruction

• Feature pistons with a coating that extends piston life, reduces friction and allow for cooler running engine
• Ideal for OE replacement
• Economical with great performance, all in one package
• Kit includes two pistons, wrist pin and clips
• Accept OE or Hastings rings (order separately) 
• For M8 107" motors

+.005" Over Standard 3.937" Bore

10.0:1 Compression Ratio