S&S CYCLE Cylinder Heads - Twin Cam 106-3240

If you're building a Twin Cam engine that demands serious port flow without sacrificing reliability, S&S Cycle cylinder heads deliver the airflow foundation every upgrade depends on. These fully assembled heads are precision-engineered to handle aggressive cam profiles, forced induction, and high-compression builds—giving you performance ceiling that grows with your engine. Whether you're running a stock 88" or pushing displacement over 103", S&S has the chamber size and valve configuration to match your build.

Technical Specifications:

• Manufacturer Part Number: 106-3240
• Application: Harley Twin Cam
• 79cc chamber option
• 89cc chamber option
• Fully assembled with springs, valves
• 79cc: 1.940" intake valve
• 79cc: 1.575" exhaust valve
• 79cc: Supports .640" lift
• 89cc: 2.000" intake valve
• 89cc: 1.605" exhaust valve
• 89cc: Supports .640" lift
• High port flow design
• CNC-machined construction
• Compression release machined
• Accepts OEM intake manifolds
• Four long headbolts included
• Four long OEM bolts reusable
• Requires S&S rocker boxes (with compression releases)
• Rocker arm components not included
• Gaskets and manifolds not included
• Made in U.S.A.
• Not Twin Cooled compatible