S&S Cycle 79cc Super Stock Cylinder Heads for 1999-2005 Harley-Davidson Twin Cam

S&S Cycle 79cc Super Stock Cylinder Heads for 1999-2005 Harley-Davidson Twin Cam

Performance cylinder heads are the single most impactful top-end upgrade available for the Twin Cam engine, and S&S Super Stock heads bring competition-proven port work and larger valves to the 1999-2005 platform without requiring custom intake manifolds, rocker boxes, or special exhaust. They accept stock hardware while delivering the breathing efficiency that allows any displacement upgrade to reach its potential.

Key Features

• 79cc combustion chamber volume with large 1.940 inch intake and 1.575 inch exhaust valves
• High-performance valve springs support camshafts with up to .585 inch lift
• Accepts OEM rocker boxes, exhaust, and intake manifolds – stock hardware compatible
• Fully assembled with springs and valves; includes four long head bolts and allows reuse of four OEM head bolts
• Machined for compression releases (sold separately)

Technical Specifications

• Chamber Volume: 79cc
• Intake Valve: 1.940 inches
• Exhaust Valve: 1.575 inches
• Max Cam Lift: .585 inches
• Finish: Wrinkle black powder coat
• Rocker Components: Not included – accepts OEM rocker arms
• Fitment: 1999-2005 Harley-Davidson Twin Cam Big Twins
• Origin: Made in USA

Fitment Notes

• Fits 1999-2005 Harley-Davidson Big Twin models with Twin Cam engines
• Both 79cc and 89cc Super Stock heads require S&S Lower Rocker Box Gasket Kit (0934-4574) – sold separately
• Compression releases sold separately; S&S rocker boxes required when using S&S compression releases
• Heads do not include rocker arm components, intake manifold, or gaskets
• Review the Fitment tab for the complete year and model breakdown