Hamilton Diesel's 12 valve springs were designed to fix many of the problems in the 12v valvetrain.
Factory and “60lb” springs do not have enough spring pressure to adequately control the valvetrain in all conditions. In fact at 1.4” they have exactly the same pressure as factory springs!.
Trucks running over 3400rpm with stock springs or 3800rpm with 60lb springs are experiencing valve float.
Features:
- Beehive design to reduce valvetrain mass, increase initial acceleration of the valve, and to cancel spring harmonics.
- Nitrided to prevent corrosion.
- Made with only the best ovate wire available to handle cams with high lift.
- Must be used with our 10° locks and ultra-light 4140 retainers.
- These springs will easily handle cams with .650” lift.
