LS 660 Lift Dual Valve Spring Kit - Factory LS Casting Cylinder Head - Integrated Seat Seal
Dual Spring Kit for Factory GM Casting Cylinder.
This kit is for a factory casting LS1, LS2, LS3, L92 with an OE style valve guide. Designed for 0.500 valve guide utilizing the factory 8mm valve and valve locks.
- Rated Valve Lift 0.660 inches
- Installed Height 1.800 @ 166 lbs
- Spring Rate: 403#/in
- Solid Height 1.015
- Spring OD 1.310"
- Spring ID 0.680"
- Dual Valve Springs
- Titanium Retainers
- Integrated Spring Seat with Valve Stem Seal
- 8mm Valve Locks
- Manufactured in the USA
- Premium Chrome Silicon Vanadium Spring Wire
- Polished Isotropic Super Finishing & Cryo Treated
- Titanium 6AL4V Grade 5 titanium retainers
- Machined & Hardened and Black Oxide Precision Spring Seats