Product Description
Texas Speed TSP .660" Dual Valve Spring Kit w/ Titanium Retainers for LT4
PAC Racing Technology | High Lift Valvetrain Upgrade | 2015+ Gen V LT4
The Texas Speed .660" Dual Valve Spring Kit for Gen V LT4 engines is engineered for serious performance builds requiring maximum valvetrain stability and durability. Developed in partnership with PAC Racing, a leader in valve spring technology, this kit utilizes advanced materials and manufacturing processes—including proprietary nano-peening—to deliver superior spring life and resistance to fatigue. Designed to support aggressive hydraulic roller camshafts up to .660" lift, this spring kit provides the control needed for high-RPM, boosted, and high horsepower LT4 applications while maintaining compatibility with factory-style lifters.
Key Features & Benefits
- PAC Racing Spring Technology – Developed with PAC Racing using advanced metallurgy and manufacturing techniques for exceptional durability and consistent performance.
- Nano-Peened Spring Design – Proprietary nano-peening process increases molecular density in the spring wire, reducing fatigue and significantly extending spring life.
- .660" Lift Capability – Engineered to support aggressive camshaft profiles while maintaining excellent valve control and stability at high RPM.
- Titanium Retainers Included – Lightweight retainers reduce valvetrain mass and improve performance and reliability under demanding conditions.
- Integrated Installation Components – Includes PRC integrated spring seats and valve seals for simplified installation and proper fitment on LT4 cylinder heads.
Specifications
- Install Height: 1.810"
- Closed Spring Pressure: 160 lbs @ 1.810"
- Open Pressure: 415 lbs @ .660" Lift
- Maximum Lift: .660"
- Coil Bind: 1.015"
Kit Includes
- Dual Valve Springs
- Titanium Retainers
- PRC Integrated Spring Seats
- Valve Seals
Fitment
- Fits 2015+ Gen V LT4 Engines Only
Important Notes
- Designed specifically for LT4 applications and not compatible with other Gen V LT engines.
- Utilizes factory GM valve stem locks (not included).
- Compatible with factory-style hydraulic roller lifters.
