BTR Brian Tooley Racing Delphi LS7 Hydraulic Roller Lifters Kit — 16 Lifters + 4 Guide Trays, OEM 12499225 Equivalent for Gen3/Gen

This kit supplies genuine Delphi hydraulic roller lifters and guide trays in a full replacement package for a wide range of Chevrolet small-block applications. Designed as BTR's equivalent to GM part number 12499225, the set fits many LS and LT engine families and is intended for non-Displacement on Demand (non-DOD) cylinder heads that originally used hydraulic roller lifters. The components arrive ready to install and are suitable for engine rebuilds, swaps, or routine maintenance where OEM-style hydraulic lifter performance is required.

Which engines and vehicle platforms are compatible with this lifter set?

These lifters and guide trays fit many GM small-block families. They work with Gen 3 and Gen 4 LS engines as well as Gen 5 LT engines, provided the application originally used hydraulic roller lifters and is non-DOD.

• Compatible engine codes: LS1, LS2, LS3, LS6, LS7, LM7, LQ4, LQ9, L83, L86, and LT1
• Supported displacements include 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L
• Intended for non-Displacement on Demand (non-DOD) cylinder heads only
• BTR equivalent to GM OEM 12499225 for straightforward part substitution

What does the kit include and how does it simplify an engine rebuild?

The package contains a full complement of lifters plus guide trays, eliminating the need to source multiple components separately. Using a matched set reduces variability and helps ensure even valvetrain operation after installation.

• One set of 16 Delphi hydraulic roller lifters (complete set for V8)
• Four guide trays that hold lifters in proper orientation during assembly
• Supplied as a direct-replacement BTR/Delphi assembly for faster rebuilds
• Ideal when replacing worn lifters, correcting noisy valvetrains, or refreshing a long-running engine

How do these hydraulic roller lifters perform compared to OEM parts?

These are genuine Delphi hydraulic roller lifters matched to BTR’s specification and intended to meet OEM form, fit, and function. Expect lifter geometry and hydraulic response designed to mirror factory behavior for reliable operation in stock and mildly modified engines.

• Delphi manufactured components for consistent hydraulic action and roller contact
• Designed to match OEM dimensions and tolerances for reliable valve actuation
• Suitable for engines retained in stock valvetrain configurations or mild performance upgrades
• Not intended for solid lifter conversions or high-lift, high-RPM race cams that require custom valvetrain components

Are there installation or compatibility cautions I should know about?

Installation requires the engine to be non-DOD and originally configured with hydraulic roller lifters; using these in DOD-specific or incompatible heads can cause fitment or functional problems. Always follow torque, break-in, and oiling recommendations during assembly to protect hydraulic elements.

• Do not install in Displacement on Demand (DOD) cylinder heads or systems
• Verify lifter bores and pushrod lengths before final assembly
• Prime oil passages and follow manufacturer break-in procedures for lifters
• Check camshaft and spring compatibility if the engine has been modified

Who is this for: This BTR Delphi LS7 lifter and tray set is aimed at mechanics, engine builders, and enthusiasts restoring or repairing GM small-block LS and LT engines that originally used hydraulic roller lifters and are non-DOD. It’s a practical choice for complete valve-train refreshes, rebuilds, or direct OEM-style replacements when you want genuine Delphi hardware matched to BTR quality and GM fitment.