MaxxEcu harness kit, GM LS III/IV full harness with connectors

MaxxECU Harness Kit for GM LS III / IV Engines (MAX-2172)

The MaxxECU MAX-2172 is a harness kit designed for GM LS III / LS IV engines, making your MaxxECU installation cleaner, faster, and more reliable. Using the correct harness solution for the LS engine family helps reduce installation time and minimizes wiring guesswork.

Features & benefits

• Makes MaxxECU installation easier on GM LS III / IV engine setups
• Cleaner wiring solution with fewer opportunities for mistakes
• Great for performance builds, project cars, and engine swaps
• Ideal when you want a reliable “do it once, do it right” install

Note: Compatibility can vary depending on the exact engine/setup (sensors, throttle type DBW/cable, vehicle platform, etc.). If you’re unsure, send us your engine code and basic setup details and we’ll help confirm fitment.