Katech LS .680 Lift Dual Valve Spring Kit with Tool Steel Retainers

Katech LS .680 Lift Dual Valve Spring Kit with Tool Steel Retainers

PSI Max Life Dual Springs with Hardened H13 Tool Steel Retainers for Compatible LS Cylinder Heads.

The Katech LS .680 Lift Dual Valve Spring Kit with Tool Steel Retainers combines PSI-1512ML dual valve springs, Katech H13 tool steel dual spring retainers, steel spring locators, and Viton valve seals. It is designed for most compatible 15-degree LS cylinder heads and LS7 heads.

The springs feature PSI's Max Life treatment. The hardened H13 retainers provide increased spring-contact wear resistance compared with titanium retainers in evaluated Katech packages. All kit components are made in the USA.

Features & Benefits

• PSI-1512ML Dual Valve Springs with Max Life Treatment
• Hardened H13 Tool Steel Dual Valve Spring Retainers
• Increased Spring-Contact Wear Resistance Compared with Titanium Retainers in Evaluated Katech Packages
• Retainers Lighter Than the Referenced OEM Components
• Steel Spring Locators
• Viton Valve Seals
• All Kit Components Made in the USA

Technical Specifications

• Product Type: Dual Valve Spring Kit
• Spring Model: PSI-1512ML
• Listed Valve Lift: .680 Inch
• Spring Pressure at 1.800-Inch Height: 130 LBS
• Spring Pressure at 1.150-Inch Height: 395 LBS
• Coil Bind Height: 1.070 Inches
• Retainer Material: Hardened H13 Tool Steel
• Locator Material: Steel
• Valve Seal Material: Viton

What's Included

• Sixteen PSI-1512ML Dual Valve Springs
• Sixteen Katech Extreme Duty H13 Tool Steel Dual Valve Spring Retainers
• Sixteen Katech Steel Spring Locators
• Sixteen Katech Viton Valve Seals

Valve locks are not included. This kit requires compatible OEM GM valve locks.

Engine & Cylinder Head Fitment

• Most Compatible GM LS Cylinder Heads with a 15-Degree Valve Angle
• Compatible GM LS7 Cylinder Heads — Shimming May Be Required for Correct Installed Height

Exclusion: This kit does not fit LS9 cylinder heads.

Confirm valve dimensions, guide configuration, and spring installed height before ordering. Aftermarket heads or modified valve arrangements may require a different component combination.

Retainer Material Selection

Katech recommends the appropriate tool steel retainers for street, road racing, and endurance applications. Titanium remains Katech's recommendation for drag racing.

Installation & Compatibility Notes

• Use Compatible OEM GM Valve Locks
• Inspect Existing Valve Locks for Wear or Damage
• Verify Spring Locator and Valve Seal Fit
• Measure Installed Height at Each Valve and Select Shims Where Required
• Check Spring Pressures Against the Camshaft Requirements
• Verify Coil Bind Clearance at Actual Maximum Valve Lift
• Check Retainer-to-Seal and Retainer-to-Guide Clearance
• Verify Piston-to-Valve Clearance for the Completed Engine Combination

The .680-inch lift designation does not establish clearance for every installation. Actual usable lift depends on installed height, coil bind clearance, and the complete valvetrain configuration.

Why Choose Katech

The Katech LS .680 Lift Dual Valve Spring Kit with Tool Steel Retainers pairs the specified dual springs with compatible retainers, locators, and seals. Published spring pressures and coil bind height help builders evaluate the package, while the LS7 shimming guidance highlights the importance of measuring the completed assembly.

For cylinder head, camshaft, and installed-height compatibility questions, contact .