3V Performance LS Premium 10° Dual Valve Spring Package

Exclusive 10-Degree Retainer and Lock System — .650"–.690" Lift

The 3V Performance LS Dual Valve Spring Package is engineered for high-performance LS combinations requiring greater spring pressure, stability, and valve control than a conventional drop-in spring kit can provide.

Unlike typical LS packages that use standard 7-degree hardware, our package features an exclusive premium 10-degree hardened chromoly retainer and lock system—a combination that provides increased locking-surface contact and secure valve-stem engagement in demanding performance applications.

The matched dual-spring design provides dependable valvetrain control for aggressive hydraulic-roller and solid-roller camshafts. With multiple installed-height options, the package can be configured to deliver the seat pressure and available valve lift required for a wide range of naturally aspirated, boosted, and nitrous-assisted LS combinations.

The 3V Performance Difference

• Exclusive premium 10-degree retainer and lock system
• Hardened chromoly retainers
• Hardened 10-degree valve locks
• High-performance dual valve springs
• Increased spring stability and valvetrain control
• Multiple installed-height and seat-pressure options
• Supports .650"–.690" valve lift when properly installed and verified
• Designed for aggressive hydraulic-roller and solid-roller camshafts
• Suitable for naturally aspirated and power-adder applications

Package Includes

• 16 high-performance dual valve springs
• 16 hardened chromoly 10-degree retainers
• 32 premium hardened 10-degree valve locks
• 16 valve-stem seals
• 16 hardened valve-spring locators

Dual Valve Spring Specifications

• Spring design: Dual
• Seat pressure: 170 lb at 1.780"
• Seat pressure: 160 lb at 1.800"
• Seat pressure: 145 lb at 1.850"
• Open pressure: 415 lb at 1.112"
• Recommended valve-lift range: .650"–.690"
• Coil-bind height: 1.060"

Installation Requirements

This is a precision performance valvetrain package. All installed heights, spring pressures, and running clearances must be measured during installation.

Before assembly:

• Thoroughly clean every component and mating surface.
• Measure the installed height of all 16 valve springs.
• Select the installed height necessary to obtain the camshaft manufacturer’s required seat pressure.
• Add the appropriate hardened shims beneath the spring locator when necessary to obtain the required installed height and spring pressure.
• Verify actual spring pressure at the measured installed height.
• Verify actual coil-bind clearance at maximum valve lift.
• Verify retainer-to-valve-seal and retainer-to-valve-guide clearance.
• Verify the inner and outer springs are correctly located and seated.
• Apply a thin film of clean engine oil or assembly lubricant to all mating surfaces.
• Confirm that the final seat and open pressures meet the camshaft manufacturer’s requirements.

Important Installation Notice

The .650"–.690" lift range depends on the engine’s measured spring installed height, actual coil-bind height, and required safety clearance. Higher-lift applications may require a taller installed height to maintain adequate coil-bind clearance.

Never rely on an advertised maximum-lift rating alone. Failure to verify installed height, spring pressure, coil-bind clearance, retainer clearance, and valvetrain geometry can result in severe valvetrain or engine damage.

Professional installation is strongly recommended.