Michigan Motorsports LS1/LS2/LS7 to LS3/L99/L76/LSA/LS9 MAP Sensor Adapter Harness — 6" Plug-and-Play, Heat-Resistant

Plug-and-play adapter harness that lets LS1, LS2 and LS7 engines accept LS3, L99, L76, LSA and LS9 ZR1 MAP sensors (GM part #12592525) without cutting or splicing.

When swapping sensors or upgrading an LS-series engine for boost or better tuning, wiring compatibility is a frequent roadblock. This Michigan Motorsports adapter harness provides a direct, OEM-style connection between older LS engines and the later-style MAP sensors used on LS3/L99/L76/LSA/LS9 ZR1 applications. At roughly 6 inches in length and built with heat-resistant materials, the harness is engineered for quick installation and long-term reliability in hot, high-vibration engine bays.

How does this adapter simplify an LS sensor upgrade?

The harness removes the need to rewire or modify factory connectors by offering a ready-made plug-and-play solution. It matches the OEM pinout and connector shape so installation is straightforward and reversible.

• OEM-style connector on both ends for direct mating
• No splicing, cutting, or soldering required
• Maintains factory wiring integrity for easy troubleshooting
• Approximately 6" length for flexible routing in engine bays

Will this work with my boosted or supercharged LS build?

Yes — it’s designed specifically to connect LS1, LS2, and LS7 engines to MAP sensors used on boosted LS variants, ensuring the ECU receives accurate manifold pressure data important for tuning. The harness is built to withstand the elevated heat and vibration of performance environments.

• Compatible with GM part #12592525 MAP sensors
• Heat-resistant wire sleeving resists engine-bay temperatures
• Durable terminals and strain relief for high-vibration use
• Ideal for supercharged, turbo, and high-horsepower setups

How easy is installation and what tools are needed?

Installation is typically a quick one-plug swap: unplug the factory MAP sensor connector and plug in the adapter, then connect the adapter to the LS3/L99/L76/LSA/LS9 sensor. No cutting or complex wiring procedures are required, so common hand tools are usually sufficient only for accessing the sensor location.

• Plug-and-play connectors — no electrical modification
• Common hand tools for sensor access (ratchet, trim removal as needed)
• Reversible installation preserves stock wiring
• Works with stock and aftermarket sensor locations where connectors match

What materials and build quality can I expect?

Michigan Motorsports engineered the harness with durability in mind: high-temperature wire insulation, robust terminals, and quality molding at the connector ends for strain relief. The result is a compact harness that resists heat, oil, and vibration commonly found in performance engine bays.

• High-temp insulation and protective sleeving
• Secure molded OEM-style connector housings
• Corrosion-resistant terminals for long life
• Compact 6" length for neat routing and minimal clutter

Who is this for? If you’re performing an LS swap, upgrading to later-model MAP sensors, installing forced induction, or refining engine tuning, this Michigan Motorsports MAP sensor adapter harness removes wiring guesswork. It’s aimed at DIY installers, professional tuners, and performance shops that need a reliable, reversible connection between older LS engine harnesses and newer LS3/L99/L76/LSA/LS9 ZR1 MAP sensors without modifying factory wiring.