Michigan Motorsports LS1/LS2/LS7 to LS3/L99/LSA/LS9 ZR1 MAP Sensor Adapter Harness - 6" Plug-and-Play, OEM-Style

Plug this Michigan Motorsports adapter harness in to let LS1, LS2 and LS7 engines accept LS3/L99/L76/LSA/LS9 ZR1 MAP sensors (GM #12592525) without cutting or splicing.

If you’re swapping engines, adding boost, or updating sensors for improved tuning, this compact 6" adapter harness offers a direct, OEM-style connection so your LS platform can use later-model GM MAP sensors. Designed for a simple plug-and-play experience, the harness preserves factory wiring integrity and provides a durable, heat-resistant link between your engine’s original wiring and the LS3/L99/L76/LSA/LS9 ZR1 MAP sensor footprint. That makes it useful for performance builds, supercharger installs, and anyone who wants accurate manifold absolute pressure readings from a modern GM sensor.

How simple is installation for a home mechanic?

Very straightforward: the harness uses matching OEM-style connectors so you don’t need to cut, splice, or fabricate adapters. Installation typically takes only a few minutes once you locate the MAP sensor connectors on your intake or firewall harness.

• Direct-fit connectors matched to factory sensor plugs
• No wiring changes required—plug into the factory harness and the sensor
• 6-inch length for flexible routing in tight engine bays
• Ideal for quick swaps and test installs without permanent wiring edits

Will this work with boosted and high-horsepower engines?

Yes — the harness is built from heat-resistant, high-durability materials intended for tough engine-bay conditions typical of performance vehicles. It simply adapts the electrical connection; proper sensor selection and tuning are still needed for higher boost or modified engines.

• Durable insulation resists heat and vibration
• Supports LS9 ZR1 MAP sensors often used in forced-induction setups
• Helps maintain accurate MAP readings for fuel and ignition tuning
• No degradation of signal when properly installed

Which GM models and sensors does this adapter support?

The adapter lets earlier LS engines (LS1, LS2, LS7) accept MAP sensors from later GM variants including LS3, L99, L76, LSA, and LS9 ZR1; it’s specifically wired for GM part number 12592525 compatibility. That gives you access to sensor footprints and calibration options from newer platforms without altering the original wiring harness.

• Compatible source engines: LS1, LS2, LS7
• Target sensors: LS3, L99, L76, LSA, LS9 ZR1 (GM #12592525)
• Maintains factory electrical plug types for easy swapping
• Useful for swaps, rebuilds, and retrofits

What else should I know before buying?

This adapter converts connector types; it does not change sensor calibration or ECU logic. Ensure your engine management or tuner recognizes the selected MAP sensor’s range and scaling, and consult your tuner if you’re using non-stock boost levels or aftermarket ECUs.

• Does not alter sensor calibration—tuning may be required
• Ideal as a non-destructive way to test or upgrade sensors
• Recommended for performance shops and DIY builders alike
• Compact, serviceable design that’s easy to remove or replace

Who is this for? This Michigan Motorsports MAP sensor adapter harness is suited to DIY enthusiasts, professional tuners, and performance builders doing LS swaps or forced-induction upgrades who need a reliable, OEM-style connector solution. If you want to fit modern GM MAP sensors to an earlier LS engine without cutting factory wiring, and keep installation quick and reversible while preserving signal integrity for tuning, this adapter is a practical, low-cost tool for your build.