Product Description
Michigan Motorsports .660" Dual Valve Spring Kit w/ Titanium Retainers
For LS-Based Engines – 4.8L, 5.3L, 5.7L, 6.0L, 6.2L – LS1, LS2, LS3, LQ4, LM7
Maximize your LS engine’s performance and reliability with the Michigan Motorsports .660" Dual Valve Spring Kit. Featuring premium American-made PAC Racing polished dual springs, lightweight titanium retainers, integrated seat/seal assemblies, and valve keeper locks, this kit is designed to handle aggressive camshaft profiles with up to .660" lift. The integrated seat/seal design simplifies installation and improves durability compared to conventional setups, making it an excellent choice for high-performance LS builds.
Kit Includes
- American-made PAC Racing polished dual valve springs rated for up to .660" lift.
- Lightweight titanium retainers for reduced valvetrain mass.
- Integrated seat/seal assemblies for easier installation.
- Valve keeper locks.
Specifications
- Install height: 1.810"
- Closed spring pressure: 160 lb @ 1.810" installed height
- Open spring pressure: 415 lb @ .660" lift
- Maximum spring lift: .660"
- Coil bind height: 1.015"
Fitment
- LS-based engines: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L
- Common applications: LS1, LS2, LS3, LQ4, LM7
- Will not fit: LS7, LS9, any Gen 5 LT1/LT4 engines, and most aftermarket cylinder heads with bronze guides.
