370Z/G37 Header Extension Harness | Fits 2009-2020 Nissan 370Z & 2008-2013 Infiniti G37/Q60 | Plug & Play O2 Extensions | Boost Performance
Boost performance installs on your 2009-2020 Nissan 370Z or 2008-2013 Infiniti G37/Q60 with this Header Extension Harness, because aftermarket headers and test pipes relocate the primary and secondary O2 sensors further downstream on the VQ37VHR and your factory wiring won’t reach, which forces you to cut, splice, or hack your OEM engine harness and risks CELs, bad sensor readings, and fried ECUs, while this kit gives you true plug & play extensions made with OEM Sumitomo connectors and TXL-grade automotive wire that clicks directly between your factory harness and O2 sensors with no splicing, soldering, or depinning, and it’s a must-have for any 370Z Base, Touring, Sport, Nismo or G37/Q60 Coupe, Sedan, Convertible, AWD, IPL running long tube headers, shorty headers, high-flow cats, or test pipes from Tomei, Z1, ISR, Motordyne, or DC Sport, and the harness uses high-temp sheathing rated to 275°F to survive header heat, plus waterproof seals and strain relief at each connector so moisture, vibration, and road grime won’t cause intermittent faults, and the extended length gives proper routing away from hot primaries so wires don’t melt, and you keep full O2 sensor functionality for accurate air/fuel trims, which means your ECU can actually take advantage of the airflow gains from your headers instead of running rich or throwing P0130/P0150 codes, and each harness is hand-assembled and continuity-tested so every pin has perfect signal, and install takes 5 minutes per side with basic tools, making this the cheapest insurance for your VHR header install because ruined OEM wiring or bad O2 readings will kill performance and cost way more to fix, so if you’re bolting on headers to your 370Z or G37/Q60, grab these extensions first and boost performance the right way with clean, reliable, OEM-quality wiring.
Key Features:
- Fits 2009-2020 370Z & 2008-2013 G37/Q60: Works with all VQ37VHR models. Base, Touring, Sport, Nismo, Coupe, Sedan, Convertible, AWD, IPL.
- Required for Header & Test Pipe Installs: Extends O2 sensors after headers or test pipes relocate bungs. Prevents stretched or damaged wiring.
- True Plug & Play with OEM Connectors: Uses genuine Sumitomo connectors that match factory harness. No cutting, splicing, or depinning needed.
- TXL-Grade Automotive Wire: High-temp 18AWG TXL wire rated to 275°F. Resists heat from primaries better than cheap PVC extensions.
- Waterproof Seals & Strain Relief: Sealed connectors with proper strain relief. Blocks moisture, road grime, and vibration from causing faults.
- Prevents CELs & Bad A/F Readings: Maintains full O2 sensor function for accurate fuel trims. Stops P0130/P0150 codes from wiring issues.
- Correct Length for Safe Routing: Extra length lets you route away from hot headers. No melted wires or contact with primaries.
- Hand-Assembled & Continuity-Tested: Every pin checked for signal integrity before shipping. No dead wires or loose terminals.
- 5-Minute Install Per Side: Unplug factory sensor, plug extension in-line, reinstall. Basic hand tools only, no ECU work.
- Works with All Major Header Brands: Compatible with Tomei, Z1, ISR, Motordyne, DC Sport, and more. Universal fix for VHR header setups.