Product Description
Texas Speed .660" Lift Dual Valve Spring Kit for Gen V LT Engines
PAC Dual Springs, Titanium Retainers & PRC Integrated Seats | Fits 2014+ LT1, L83, L86, L84, L87, L8T
The Texas Speed .660" Lift Dual Valve Spring Kit is engineered specifically for 2014+ Gen V LT engines requiring a taller installed height than traditional LS platforms. Developed in partnership with PAC Racing Springs, this kit delivers exceptional valvetrain control and durability for aggressive hydraulic roller camshafts while remaining fully compatible with factory-style lifters. Featuring PAC’s proprietary nano-peening process and PRC’s patent-pending integrated valve seat and seal design, this kit maximizes spring life, reduces fatigue, and simplifies installation—making it a premium solution for serious Gen V LT performance builds. Not compatible with LT4 applications.
Key Features
- .660" Lift Dual Spring Design: Engineered for Gen V LT engines with taller installed height requirements, delivering excellent control for aggressive hydraulic roller camshafts.
- PAC Racing Spring Technology: Utilizes PAC’s proprietary nano-peening process to increase residual wire stress, reducing spring fatigue and extending service life under high-RPM conditions.
- PRC Integrated Seat & Seal: Patent-pending Precision Race Components integrated valve seat and seal design ensures proper installation with no risk of seal damage or misalignment.
- Titanium Retainers Included: Lightweight titanium retainers improve valvetrain stability and durability while supporting higher lift and RPM capability.
- Factory Lifter Compatible: Designed to work seamlessly with factory-style hydraulic roller lifters for reliable street and performance use.
Kit Contents & Specifications
- Included Components: PAC Racing Gen V LT-specific polished dual valve springs, PRC integrated spring seats & valve seals, and titanium retainers (uses GM factory valve stem locks, not included).
- Installed Height: 1.900"
- Spring Pressures: 160 lbs closed @ 1.900" | 406 lbs @ .650" lift | 425 lbs @ .700" lift
- Maximum Recommended Lift: .660" | Coil Bind: 1.09"
Key Fitments
- Gen V LT Engines: Fits 2014–newer LT1, L83, L86, L84, L87, and L8T engines in 5.3L, 6.2L, and 6.6L configurations.
- Important Fitment Note: WILL NOT fit LT4 supercharged engines.
- Performance Applications: Ideal for street/strip and performance builds running higher-lift hydraulic roller camshafts requiring increased spring control and durability.
Product Videos
Custom Field
Product Reviews
1 Review Hide Reviews Show Reviews
-
Great product
Good quality product. Excellent seller. Fast and strong packaging. Everything works well
