Lunati Dual Valve Spring Kit - LS Engines (Steel Retainers)
Racers and engine builders of LS Series GM engines now have a proven, extreme usage valve spring, spring retainer, valve lock and valve stem seal kit that safely extends engine RPM and boosts performance capability with normally aspirated or power-added LS engines.
Lunati’s kit features precision wound, heat set, dual valve springs for required seat and open load pressure plus total spring travel to accommodate cams with aggressive gross valve lifts of up to .660”. The valve springs in each kit are carefully tension matched and all supplied components come complete and ready to install.
Included are Lunati’s CNC machined, steel alloy spring retainers, CAD designed to deliver maximum strength and durability. Precision fit spring locators are included and are designed to accurately locate the inner spring, preventing abrasion with aluminum LS Series heads. Precision machined and hardened steel alloy 7-degree valve locks are also provided for superior valve stem holding reliability. Premium quality, Viton® steel reinforced valve stem seals are included for correct valve stem lubrication and oil control.
Valve Spring Specs:
- 1.306" Outside Diameter
- 0.676" Inside Diameter
- Maximum lift: .660"
- Seat load: 153# at 1.810"
- Open load: 400# at 1.150"
- Rate: 379#/inch
- Coil bind: 1.100"
PART NUMBER: LUN-73925K1
