Dynosty TSP Delphi LS7-style Hydraulic Lifters & Trays — 16 Lifters + 4 Guide Trays for GM LS Gen III/IV & Gen V LT1, Non-AFM/DOD

These Dynosty TSP Texas Speed Delphi LS7-style hydraulic lifters and guide trays replace AFM/DOD units and restore reliable valvetrain operation on GM LS Gen III/IV and Gen V LT1 engines.

Designed as a drop-in replacement for GM OEM 12499225, this kit includes 16 Delphi LS7-style lifters and four guide trays engineered for non-DOD/AFM applications across a wide range of LS-series and LT1 engines. If you're removing factory Displacement on Demand (DOD)/Active Fuel Management (AFM) components or refreshing a worn valvetrain, these lifters give a stock-geometry, serviceable option with TSP-specified upgrades for durability and fitment.

Will these lifters fit my GM engine?

They are made for LS-family engines that do not use active fuel management. Confirm your engine does not require DOD/AFM lifters before purchasing; these are intended to replace fixed-base lifters across many Gen III/IV LS and Gen V LT1 motors.

• Compatible: LS1, LS2, LS3, LS6, LS7, LM7, LQ4, LQ9, L83, L86, and LT1
• Fits displacements: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L (Gen 3/4 and Gen 5)
• Non-DOD/AFM only — not for engines requiring active lifter mechanisms
• TSP equivalent to GM OEM part 12499225 for direct-replacement applications

How do these lifters compare to factory AFM/DOD units?

Unlike AFM/DOD lifters, these Delphi LS7-style lifters are fixed-base hydraulic units that eliminate the variable-displacement mechanism. They provide a simpler, more robust valvetrain when AFM/DOD functionality is removed, and they reduce complexity for rebuilds or performance swaps.

• Removes AFM/DOD complexity for a straightforward hydraulic lifter setup
• Reduced failure points compared with active lifter systems
• Ideal for engines converted away from displacement-on-demand operation

What are the kit contents and installation considerations?

The package contains a full set of 16 lifters plus four guide trays—enough for a complete V8 valvetrain refresh. Installation requires basic disassembly of rocker assemblies and lifter valley components; check pushrod length and valvetrain geometry during reassembly to ensure correct clearance.

• Includes: 16 TSP Delphi LS7-style lifters and 4 guide trays
• Drop-in fit for compatible engines but verify pushrod lengths if cam or heads changed
• Use factory torque specs and follow lifter preload procedures on reassembly

What performance or durability benefits should I expect?

These lifters deliver reliable cam-to-valve actuation without AFM/DOD complexity, offering long-term service life when installed and maintained properly. They’re well-suited to stock and mildly upgraded cams where a fixed hydraulic lifter is preferred for consistency.

• Stabilizes valvetrain operation after AFM/DOD delete or during rebuilds
• Built to TSP specifications for fit and durability compared with OEM replacements
• Appropriate for both restoration and moderate performance applications

Who is this for: This Dynosty TSP Texas Speed lifter and tray kit is aimed at mechanics, engine builders, and enthusiasts replacing worn lifters, removing AFM/DOD systems, or restoring LS and LT1 valvetrains to a fixed hydraulic setup. If you need a practical, direct-replacement lifter solution for non-DOD engines—whether for daily drivers, project cars, or mild performance builds—this complete set supplies the lifters and guide trays required for a reliable install.