Description
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
