Michigan Motorsports LS1 O2 Oxygen Sensor Extension Harness - 24in Set of 2, 4‑Pin OEM-Style

The Michigan Motorsports LS1 24-inch O2 oxygen sensor extension harness is a plug-and-play pair of 4-pin extensions that add reach to factory LS1 sensor wiring without cutting or splicing.

If you're relocating exhaust components, fitting aftermarket headers, or performing engine work that alters sensor placement on LS1 platforms, these extensions give you the extra wiring length needed while preserving the original harness. Built with OEM-style 4-pin connectors and automotive-grade conductors, this set of two 24" leads maintains proper electrical contact and a tidy, factory-like installation on Camaro, Firebird, Pontiac and Chevy LS1 applications.

How will this extension harness simplify installation when I change headers or exhaust?

The extension adds 24 inches of wiring so oxygen sensors can reach their vehicle harness after exhaust or header modifications. Because the connectors match factory 4-pin plugs, you avoid cutting or modifying OEM wires, which reduces installation time and preserves serviceability.

• 24" extra length per harness to bridge relocated sensors
• Factory-style 4-pin connectors for direct mating
• No splicing or soldering required—plug in and go
• Keeps wiring neat for easier future servicing

Will these work with my LS1-equipped Camaro, Firebird, Pontiac or Chevy?

Yes—these extensions are made specifically for LS1 oxygen sensor circuits that use a 4-pin connector format. They match the standard pin arrangement and connector shape used in stock LS1 harnesses to ensure compatibility across those GM models.

• Designed for LS1 sensor wiring systems
• Compatible with common LS1 model years and platforms
• Intended for 4-pin upstream or downstream sensors
• Sold as a set of two for dual-sensor setups

What are the build details and how durable is the wiring?

The harnesses use automotive-grade insulation and terminals that withstand typical engine-bay heat and exposure. While not a replacement for heavy-duty race wiring, the construction is intended for reliable electrical continuity and to mimic factory fit-and-finish for street and light-performance use.

• Automotive-grade wire insulation for high-temperature zones
• OEM-style terminals to preserve signal integrity
• Sealed connector housings to resist moisture and dirt
• 24" length matched to common modification needs

Can I reinstall the original sensor wiring later if I remove aftermarket parts?

Yes. Because the extensions plug directly into the factory harness and sensor, removing aftermarket exhaust or headers is straightforward—simply unplug the extensions and reconnect the OEM wiring. This preserves the original harness and keeps the vehicle reversible to stock configuration.

• Plug-and-play connectors keep factory wiring intact
• Removable without cutting or permanent changes
• Maintains original sensor and harness condition for resale
• Helps keep vehicle compliant with original wiring layout

Who is this for: Michigan Motorsports LS1 24" O2 sensor extension harnesses are aimed at owners and technicians who modify or service LS1 engines and need additional sensor reach without altering factory wiring. They suit DIY mechanics changing headers or exhaust, performance shops performing engine swaps, and restoration projects where preserving the original harness and connector integrity matters. If you run LS1-based Camaro, Firebird, Pontiac or Chevy platforms and require straightforward, OEM-style oxygen sensor extension, this set provides a neat, reliable solution that simplifies installation and future servicing.