TSP GM Delphi LS7 Lifters - Full Set of 16 (28-25341990-16)
The Performance Industry Standard for LS and LT Valvetrain Reliability.
The TSP GM Delphi LS7 Lifters Set (P/N 28-25341990-16) is the most trusted hydraulic roller lifter for GM V8 engines. Whether you are performing a camshaft swap or a complete AFM/DOD removal, these authentic Delphi lifters provide the superior oiling and pressure stability required for high-performance applications. This set includes 16 precision-engineered lifters.
- Brand: Texas Speed & Performance (TSP) / Delphi
- Lifter Type: Hydraulic Roller (LS7 Style)
- Quantity: 16 Individual Lifters
- Fitment: Gen III / IV LS and Gen V LT Engines
- Condition: Brand New / Genuine Delphi components
- Part Number: 28-25341990-16
⚠️ CRITICAL INSTALLATION & FITMENT DATA
AFM/DOD Note: These lifters are for Non-DOD applications only. If your engine was originally equipped with Active Fuel Management (AFM) or Displacement on Demand (DOD), you must install an AFM removal kit and proper camshaft to use these lifters.
Technical Fitment Guide:
- Engine Platforms: Fits 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L.
- Compatible Codes: LS1, LS2, LS3, LS6, LS7, LM7, LQ4, LQ9, L83, L86, LT1.
- Important Service Advice: We strongly recommend installing new guide trays whenever lifters are replaced. If you need a complete package with trays included, please see our Lifter and Tray Kit below.
Lifter Pre-Soaking: We recommend soaking lifters in fresh engine oil for 15-30 minutes prior to installation to ensure initial lubrication upon first startup.
Why Choose Delphi LS7 Lifters?
Originally developed for the Corvette Z06, Delphi's LS7 lifter is designed to handle higher RPMs and increased spring pressures compared to standard factory lifters. They are a "drop-in" upgrade that provides peace of mind for both daily drivers and high-horsepower track vehicles.
Select Your Configuration:
• Lifters Only (Set of 16) - Best for those who already have new guide trays.
• Lifter & Tray Kit - Recommended for a complete and reliable installation.
