Product Description
Michigan Motorsports Grey 24" O2 Sensor Extension Harness – Square 4 Pin LS1 LS2 LS6 GM
24" Grey Square 4-Pin Oxygen Sensor Wire Extension | Plug-and-Play for Select GM Fitments
This Michigan Motorsports 24" Grey O2 Sensor Extension Harness is built for installs where your factory oxygen sensor wiring comes up short—especially with long tube headers, engine swaps, and custom exhaust routing. Featuring a grey square 4-pin connector, this extension plugs inline between your factory harness and O2 sensor for a clean, no-hassle install with no cutting or splicing. Designed to help maintain stable sensor signal and proper feedback to the ECM, it’s a simple upgrade that keeps your wiring safe, secure, and routed the right way. These will work on many GM applications beyond those listed—always verify connector style by comparing photos before ordering.
Key Features & Benefits
- True 24-Inch Extension Length – Adds a full 24" of reach to relieve tension on factory O2 wiring during header installs and exhaust modifications, helping prevent broken connectors, pulled pins, or damaged wiring.
- Grey Square 4-Pin Connector – OEM-style grey square 4-pin connector design for secure engagement and reliable fitment on compatible GM oxygen sensor wiring, helping ensure consistent connectivity.
- Plug-and-Play Inline Install – Installs in minutes between the factory harness and sensor with no cutting, splicing, or soldering required, keeping your wiring intact and your install clean and professional.
- Supports Accurate O2 Feedback – Quality construction helps maintain stable oxygen sensor signal feedback so your ECM can properly manage fuel trims and drivability after exhaust or header upgrades.
- Fits Many GM Applications – Commonly used on LS-based platforms and other GM vehicles beyond those listed. Always compare connector pictures to confirm you are ordering the correct style for your application.
Key Fitments
- 2008–2009 Pontiac G8 GT V8 – Grey square 4-pin O2 extension solution for performance exhaust and header installs.
- 2004–2006 LS1/LS2 Pontiac GTO (Front Sensors) – Provides the extra reach needed when factory front sensor wiring is stretched by long tubes or custom routing.
- 2004–2005 LS6 Cadillac CTS-V (Front Sensors & Rear) – Helps extend O2 wiring for both front and rear sensor locations depending on your setup and connector match.
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Product Reviews
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Quality products.
Great customer service. Fast delivery. Product quality is outstanding.
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Wonderful to work with
Super customer service!
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GREAT COMPANY
Great piece, works perfectly!
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Good fitment
Exactly what I needed. Thanks for the quick shipping.
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GREY 02 OXYGEN SENSOR EXTENSION SQUARE 4 PIN
Fast shipping and excellent quality
