{"product_id":"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","title":"Dynosty TSP Delphi LS7-style Hydraulic Lifters \u0026 Trays — 16 Lifters + 4 Guide Trays for GM LS Gen III\/IV \u0026 Gen V LT1, Non-AFM\/DOD","description":"\u003cp\u003e\u003cstrong\u003eThese 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.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned 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.\u003c\/p\u003e\n\n\u003ch3\u003eWill these lifters fit my GM engine?\u003c\/h3\u003e\n\u003cp\u003eThey 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible: LS1, LS2, LS3, LS6, LS7, LM7, LQ4, LQ9, L83, L86, and LT1\u003c\/li\u003e\n  \u003cli\u003eFits displacements: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L (Gen 3\/4 and Gen 5)\u003c\/li\u003e\n  \u003cli\u003eNon-DOD\/AFM only — not for engines requiring active lifter mechanisms\u003c\/li\u003e\n  \u003cli\u003eTSP equivalent to GM OEM part 12499225 for direct-replacement applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these lifters compare to factory AFM\/DOD units?\u003c\/h3\u003e\n\u003cp\u003eUnlike 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRemoves AFM\/DOD complexity for a straightforward hydraulic lifter setup\u003c\/li\u003e\n  \u003cli\u003eReduced failure points compared with active lifter systems\u003c\/li\u003e\n  \u003cli\u003eIdeal for engines converted away from displacement-on-demand operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the kit contents and installation considerations?\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes: 16 TSP Delphi LS7-style lifters and 4 guide trays\u003c\/li\u003e\n  \u003cli\u003eDrop-in fit for compatible engines but verify pushrod lengths if cam or heads changed\u003c\/li\u003e\n  \u003cli\u003eUse factory torque specs and follow lifter preload procedures on reassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance or durability benefits should I expect?\u003c\/h3\u003e\n\u003cp\u003eThese 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.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStabilizes valvetrain operation after AFM\/DOD delete or during rebuilds\u003c\/li\u003e\n  \u003cli\u003eBuilt to TSP specifications for fit and durability compared with OEM replacements\u003c\/li\u003e\n  \u003cli\u003eAppropriate for both restoration and moderate performance applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho 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.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can these lifters be used on AFM\/DOD engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These lifters are for non-AFM\/DOD engines; use them only after AFM\/DOD components are removed or on engines that never had active lifters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I get everything needed to replace all eight cylinders?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes 16 lifters and 4 guide trays—enough for a complete V8 valvetrain replacement.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Dynosty","offers":[{"title":"Default Title","offer_id":48081437687966,"sku":"B0CKJ7QFYZ","price":358.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/dynosty-lifters-front-packaging.jpg?v=1785804501","url":"https:\/\/northtrailauto.ca\/products\/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","provider":"North Trail Auto","version":"1.0","type":"link"}