S&S Cycle Cylinder Stud & Head Bolt Kit For Harley M8 Models

Cylinder stud & head bolt kit for Harley M8 models

Upgrade your Harley-Davidson® M8 engine with the S&S Cycle Cylinder Stud & Head Bolt Kit. Engineered for high performance, these 4140 Chrome Moly studs feature rounded thread roots for improved fatigue strength and are oil quenched and tempered to 39-44 HRC. The kit includes 8 head bolts made from heat-treated 8640 steel for a 14% increase in strength over stock, delivering up to 200,000 psi ultimate tensile strength. Positive stop shoulders ensure consistent installed height, and the cold-formed heads and integral washers guarantee reliable installation. Compatible with both MLS and graphite head gaskets. Perfect for riders seeking durability and reliability under demanding conditions.

• 180,000 psi tensile strength (studs)
• 200,000 psi tensile strength (bolts)
• Reusable and compatible with performance gaskets
• Includes 8 studs and 8 head bolts for a complete install