3mirrors Engine Valve Lifter Guide Trays 12595365 4-Pack for GM LS V8s — OE Fit, Stabilizes Lifters

3mirrors Engine Valve Lifter Push Rod Guides Trays (part 12595365) are a 4-piece set designed to replace OE-style lifter guides on GM LS-series V8 engines for reliable alignment and quieter valvetrain operation.

If you’re rebuilding, converting away from AFM/DOD components, or refreshing the valvetrain on a Gen III/IV/V GM small-block, these guides are machined to match the original equipment dimensions so lifters and push rods track correctly. The 3mirrors set reproduces the OE fit and finish to maintain proper lifter seating, reduce lateral movement, and help prevent premature wear when used with conventional LSx lifters.

How do these guide trays improve valvetrain alignment?

The guides center hydraulic roller lifters and push rods inside the lifter bore, reducing side-to-side movement that can lead to scuffing or uneven wear. By restoring correct geometry, they support consistent lifter travel and quieter operation across the rpm range.

• Manufactured to OE-style dimensions for accurate fit.
• Stabilizes lifter location to minimize lateral play.
• Reduces risk of push rod/pivot misalignment and noise.

Which engines and conversions are these compatible with?

This 4-pack fits GM Gen IV V8 lifter guides and is compatible with many LS family engines including LS2, LS3, LS7, LSA, and LS9; it also works in Gen III (LS1, LS6) and Gen V blocks such as LT1, L86, L83, and LT4 when using conventional lifters. These trays let you convert AFM/DOD valvetrains to standard lifters, but they will not function with AFM/DOD lifters themselves.

• OE reference: 12595365—designed to match GM specifications.
• Fits Gen III, Gen IV, and some Gen V LS-style blocks.
• Use only with conventional LSx hydraulic roller lifters (not AFM/DOD lifters).

What should I expect during installation and service life?

Installation follows standard lifter guide replacement procedures; press-in location and torque for the included tray bolts should mirror factory guidance. When installed correctly and paired with the appropriate lifters, these guides provide long-term positional stability, though overall service life depends on lubrication, engine use, and maintenance.

• Sold as a set of four guides plus tray bolts for a straightforward swap.
• Engine rebuilders should verify bore condition and clearances before install.
• Compatible with conversions away from AFM/DOD — requires switching to conventional lifters.

Who is this product for? 3mirrors 12595365 guide trays are aimed at engine builders, performance enthusiasts, and repair shops working on GM LS-series V8s who need OE-dimension lifter guides for rebuilds or conversions. If you’re replacing worn guides, converting an AFM/DOD system to conventional lifters, or restoring correct lifter alignment during a valvetrain refresh, this 4-pack provides an OE-style, cost-effective solution engineered to fit GM blocks that accept LS-style lifters.