Description
S&S Cycle cylinder heads deliver measurable flow improvements that enhance performance immediately while laying the foundation for future engine modifications. Whether you’re running a stock 88″ big twin or pushing displacement north of 103″, these fully assembled heads eliminate guesswork with purpose-built chamber volumes and valve configurations. Machined for compression releases and manufactured domestically, they’re built to handle serious horsepower gains without compromise.
- Fully assembled with springs, valves
- 79cc: 1.940″ intake / 1.575″ exhaust
- 89cc: 2.000″ intake / 1.605″ exhaust
- Valve lift capacity: .640″
- 79cc: stock 88–103″ displacement
- 89cc: 103″+ or high-compression pistons
- Compression release machined
- Four long headbolts included
- Reuses four OEM long bolts
- Accepts OEM intake manifolds
- Requires S&S rocker boxes (if using compression releases)
- Rocker arm components not included
- Made in U.S.A.
- Incompatible with Twin Cooled
