Description
If you’re running an M8 Harley and serious about maximizing valve lift and timing precision, a gear drive cam conversion eliminates the slop inherent in stock chain drives—giving you tighter valve events and the clearance to run aggressive cam profiles that stock geometry simply won’t allow. S&S’s 475G delivers the accuracy and durability you need for high-horsepower builds, while the reversed rear cam rotation opens up additional lobe clearance for higher lifts without interference. This is a fabrication-level upgrade that separates purpose-built engines from bolt-on modifications.
- Eliminates timing chain lash
- Increases maximum valve lift
- Reverses rear cam rotation
- Reduces valve train play
- Includes inner & outer gears
- Includes cam bearings & gaskets
- CNC-precision gear drive
- M8 Harley-Davidson fitment
- Requires high-performance valve springs (99-04 models)
- Requires professional installation tools
- Hydraulic press required
- Stock gear cover machining required
- No tuning needed
- Made in U.S.A.
- Verify coil bind before assembly
- Verify valve-to-valve clearance
- Verify valve-to-piston clearance
- Expect increased valve train noise
- Bolt-in stock cam timing option
- MPN: 310-1010A
