Engine Valve Spring Kit

drop-in valve spring kit for GM L31 Vortec Cylinder Heads

• Drop-in valve spring kit for GM L31 Vortec cylinder heads
• No machining required
• Includes metal body
• Viton valve stem seals
• .510" max lift

this spring kit is ready to bolt onto LS heads with aggressive cams with up to .600" valve lift.

this spring kit is ready to bolt onto LS heads with aggressive cams with up to .625" valve lift.

this spring kit is ready to bolt onto LS heads with aggressive cams with up to .625" valve lift.

seals and locks for a complete kit that can handle .615" lift from aggressive roller cams.

seals and locks for a complete kit that can handle .615" lift from aggressive roller cams.

this spring kit is ready to bolt onto LS heads with aggressive cams with up to .660" valve lift.

this spring kit is ready to bolt onto LS heads with aggressive cams with up to .675" valve lift.

this spring kit is ready to bolt onto LS heads with aggressive cams with up to .650" valve lift.

this spring kit is ready to bolt onto LS heads with aggressive cams with up to .675" valve lift.

Chromemoly Steel Retainers and our 10 Degree Super Valve Locks.

The M8 Spring and Retainer kit features our Beehive springs for a .530" max lift and increased valvetrain stability. The kit includes our Tool Steel retainers for increased strength and light weight.

• The Harley M8 spring kit increases maximum valve lift to 0.540".
• Beehive valve spring design increases valvetrain stability
• Lightweight tool steel retainers reduce valvetrain weight while increasing rigidity

drop-in valve spring kit for GM L31 Vortec Cylinder Heads

• Drop-in valve spring kit for GM L31 Vortec cylinder heads
• No machining required
• Includes metal body
• Viton valve stem seals
• .540" max lift