S&S CYCLE Cylinder Heads - Twin Cam 106-3233

If you're building a Twin Cam engine that demands reliable airflow and the flexibility to upgrade later, S&S Cycle cylinder heads deliver the port flow you need without forcing a complete rebuild down the road. These fully assembled heads accept OEM intake manifolds while offering genuine performance gains—whether you're running a stock 88-incher or pushing a 103+ displacement motor with high-compression pistons. Built in the USA and engineered for precision, they're the foundation of a serious power plant.

• Fully assembled, ready to install
• High port flow design
• 79cc chambers (stock 88–103" motors)
• 89cc chambers (103"+ or high-compression)
• 79cc: 1.940" intake / 1.575" exhaust valves
• 89cc: 2.000" intake / 1.605" exhaust valves
• Springs rated .640" valve lift
• Machined for compression releases
• Accepts OEM intake manifolds
• Compression ratios vary by application
• Includes four long headbolts
• Reuse four OEM long bolts
• Requires S&S rocker boxes (if using S&S compression releases)
• Rocker arm components not included
• Gaskets not included
• Not compatible with Twin Cooled
• Made in USA
• MPN: 106-3233