S&S Cycle 930-0091 Head Gasket 3.625" Bore Harley Evolution Big Twin

S&S Cycle 930-0091 head gaskets are precision-engineered replacement gaskets designed for Harley-Davidson Evolution Big Twin engines from 1984-1999. These high-performance head gaskets feature a 3-5/8 inch (3.625 inch) bore size with a .045 inch thickness, providing the ideal seal for stock and performance cylinder heads.

Key Features:

• Constructed from premium aramid fiber-reinforced graphite material for superior heat resistance and durability
• Steel core construction with stainless steel fire ring for enhanced sealing performance
• Anti-stick coating prevents gasket adhesion and simplifies future disassembly
• 3.625 inch bore size perfectly suited for Evolution Big Twin applications
• 0.045 inch compressed thickness ensures proper compression ratio and sealing
• Sold in pairs for complete cylinder head installation
• Made in the USA with S&S quality and precision

These head gaskets are ideal for engine rebuilds, cylinder head upgrades, or routine maintenance on Evolution Big Twin motorcycles. The advanced graphite composite material with Kevlar reinforcement provides exceptional resistance to blowout and extrusion, while the stainless steel fire ring protects the most critical sealing area around the combustion chamber. S&S Cycle's proven design ensures reliable performance for both street and performance applications.