3mirrors Valve Spring Compressor 67605 for Chevy LS 4.8–6.2L — Bolt-On CNC Hardened Tool

This 3mirrors valve spring compressor kit is a heavy-duty, bolt-on tool designed to safely remove and install valve springs on Chevy LS series engines (4.8L–6.2L) and select GM and Dodge blocks.

Built for professional shops and serious DIYers, the 3mirrors 67605 compressor converts OE-style retainers using precision CNC components and hardened hardware. It reproduces OE fitment for LS1, LS2, LS3, LS6 and LSX platforms as well as many trucks and performance cars, letting you tackle valve spring jobs without expensive overhead valve tool setups.

How does this tool work on LS engines?

The kit clamps to the cylinder head and uses a T-shaped compressor arm to compress the valve spring, giving clear access to retainers and keepers. It’s configured to align with factory bolt patterns so you don’t modify heads or risk damage during service.

• Fits factory bolt holes on LS family heads for repeatable positioning
• T-marked parts indicate orientation for quick setup
• CNC-machined components maintain alignment while compressing springs

Which vehicles and engine sizes are supported?

This 67605 tool is specified for GM LS engines 4.8L, 5.3L, 5.7L, 6.0L and 6.2L used in Camaro, Corvette, CTS-V, GTO, G8 and many GM trucks and SUVs. It’s also adaptable to some Dodge small-blocks using original bolts.

• Direct compatibility with LS1/LS2/LS3/LS6 and LSX heads
• Works on Chevy Camaro, Corvette, Silverado, Sierra, Tahoe, Suburban
• Can be used on Dodge 318/360 blocks with existing fasteners (user-supplied)

What materials and build quality should I expect?

The kit uses 3/8" steel fasteners and precision CNC-machined parts for durability and accurate engagement. Hardness-rated bolts (10.9 and 12.9 grades) reduce wear and bending compared with cheaper 8.8-grade hardware.

• Precision CNC machining for tight tolerances and repeatable use
• Grade 10.9 and 12.9 bolts for higher strength and long life
• Marked "TOP" on T-shaped pieces to avoid assembly errors

Are springs or extra hardware included?

The package contains the compressor components and the hardened bolt kit only; valve springs, retainers, and keepers are not included. Always read the supplied instructions and apply light lubrication to moving parts for smoother operation.

• Springs, retainers and keepers sold separately
• Follow printed instructions before first use
• Lubricate contact points for optimal performance and reduced wear

Who is this for: The 3mirrors 67605 valve spring compressor is aimed at professional mechanics, engine builders and experienced home mechanics who work on GM LS-family engines or need a robust, repeatable method to service valve springs. It’s especially useful when you want an OE-style clamping approach without renting dealership tools; choose this kit if you value precision fit, strong hardware, and a straightforward setup for frequent valve spring work.