BTR Brian Tooley Racing Delphi LS7 Hydraulic Roller Lifters Kit — 16 Lifters + 4 Trays, OE-fit Non‑DOD

Genuine Delphi hydraulic roller lifters and guide trays from BTR (set of 16 lifters + 4 trays) engineered to replace GM OEM 12499225 in non‑DOD Gen 3/4 LS and Gen 5 LT engines.

These Brian Tooley Racing (BTR) Delphi LS7 lifters and accompanying guide trays are a direct-fit replacement for many Chevrolet LS and LT applications that originally used hydraulic roller lifters. Manufactured to OE specifications, this complete kit is intended for non‑displacement on demand (Non‑DOD) cylinder heads and covers a wide range of engines including LS1 through LS7 families and select LT1 V8s. The set provides a straightforward swap to restore reliable valve actuation without requiring rework of pushrods or rocker geometry in compatible engines.

Will these lifters fit my engine?

These Delphi lifters are compatible with numerous Gen 3 and Gen 4 LS engines and Gen 5 LT engines when the vehicle originally used hydraulic roller lifters. They replace the GM OEM part 12499225 where Non‑DOD lifters are required. Always verify your engine family and DOD/AFM status before ordering.

• Fits LS1, LS2, LS3, LS6, LS7 and many truck-based LM7, LQ4, LQ9 variants
• Compatible with LT1 4.8L, 5.3L, 5.7L, 6.0L and 6.2L Non‑DOD engines
• Direct BTR equivalent to GM OEM 12499225 for retrofit or repair
• Not for use in DOD/AFM equipped cylinder heads

How do these lifters improve engine maintenance and reliability?

Replacing worn lifters with new Delphi hydraulic roller lifters restores correct valve motion and reduces noise, lash, and erratic cam actuation tied to collapsed or contaminated lifters. The guide trays maintain proper lifter alignment and stability under valve train loads, lowering the chance of premature wear and hydraulic binding.

• New internal hydraulics deliver consistent valve clearance control
• Trays keep lifters indexed and reduce lateral movement in the block
• OE-spec dimensions for straightforward installation and long service life
• Helps eliminate lifter-related ticking and irregular idle behavior

What do I need to install this lifter and tray kit?

Installation typically requires intake removal and access to the valley for lifter removal and tray placement. Use proper torque specs, clean oil passages, and inspect pushrods and cam lobes for wear—replace any components out of spec. Professional installation is recommended if you’re unfamiliar with valvetrain service.

• Intake manifold and valley cover removal on most LS/LT engines
• Clean oil galleries and check cam lobes/pushrods for damage
• Correct torque values and assembly lube for safe startup
• Verify Non‑DOD engine configuration before beginning

Why choose the BTR Delphi LS7 lifter set over generic or reman parts?

BTR sources genuine Delphi components built to the original equipment tolerances, offering consistent hydraulic action and dimensional accuracy. That reduces the risk of fitment issues and returns the valvetrain behavior closer to factory specifications compared with unknown‑origin parts.

• Genuine Delphi lifters for predictable hydraulic performance
• BTR packaging and part equivalence to GM OEM 12499225
• Complete kit (16 lifters + 4 trays) for full V8 valvetrain refresh
• Suitable for routine rebuilds, repairs, and performance refreshes

Who is this for: This lifter and tray kit is aimed at DIY mechanics, engine builders, and performance shops working on non‑DOD LS and LT V8s that require a full set of OE‑spec hydraulic roller lifters. If you’re restoring valve train reliability, replacing lifter sets during a cam swap, or repairing lifter failure on compatible GM engines, this BTR Delphi kit provides a comprehensive, direct-fit solution without modifying cylinder heads or pushrods.