BTR LT4 .660 Lift Dual Valve Spring Kit - Stock Guides

BTR .660" Platinum LT4 Valve Spring Kit is a premium dual-spring valvetrain solution engineered specifically for Gen V LT4 direct-injection engines equipped with stock-style powdered metal valve guides. Renowned across the LS and LT aftermarket, the Platinum Spring Kit delivers precise valve control across a wide range of performance levels—from mild street builds to extreme high-horsepower forced-induction applications.

Designed to support aftermarket camshaft upgrades, this kit ensures your valves stay exactly where your camshaft commands at all RPM levels, reducing valve float and improving long-term valvetrain stability. When Gen V LT engines entered the performance landscape, BTR engineered the Platinum Spring Kit to integrate seamlessly with the direct injection valvetrain architecture, using carefully selected supporting components for proper installed height and durability.

This kit installs as a true drop-in solution for Gen V LT4 engines with stock powdered metal valve guides, requiring no machining and maintaining factory geometry while supporting up to .660" valve lift.

BTR LT4 .660 Lift  Dual Valve Spring Kit - Stock Guides

• Dual Valve Springs
• Titanium Valve Spring Retainers
• .060" & .045" Thick Locators
• Black Valve Seals
• Valve Locks
• 1.015" Exhaust Shims

VALVE SPRING SPECIFICATIONS

• Seat Pressure: 155 lbs @ 1.780"
• Open Pressure: 380 lbs @ 1.180"
• Open Pressure (Max): 400 lbs @ 1.130"
• Coil Bind Height: 1.070"
• Maximum Valve Lift: .660"

• Length: 12.000"
• Width: 3.000"
• Height: 4.000"
• Weight: 8.0 lbs

FITMENT 

• Engine Type: GEN V LT4
• Cylinder Heads: Factory LT4 Cylinder Heads
• Guide Compatibility: Stock-style powdered metal guides only. 

BRIAN TOOLEY RACING PART NUMBER |  SK008

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