Description
If you’re running a smaller-displacement engine and leaving performance on the table with stock heads, the S&S CYCLE 106-4570 delivers measurable gains in flow and compression without sacrificing the reliability you need for consistent racing or spirited street duty. This fully assembled, U.S.-manufactured head pairs optimized port geometry with high-lift valve springs to unlock additional horsepower and torque across the RPM band. Whether you’re tuning a naturally aspirated setup or preparing for forced induction, this head gives you the thermal efficiency and valve timing flexibility to maximize your engine’s potential.
- S&S CYCLE 106-4570 MPN
- Fully assembled, ready to install
- Stainless steel valves included
- High-lift springs: .585″ maximum
- 82cc chamber volume
- 8.8:1 compression ratio (80″ displacement)
- Optimized port flow design
- Maintains velocity under load
- Compatible with stock flat-top pistons
- EFI compatible
- Bolt-on installation
- Made in the U.S.A.
- Intake manifold sold separately
- Gasket kits sold separately
