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SKU: EX682-Z | UPC: 842422116279
Kooks EX682-Z Universal O2 Sensor Extension Harness – 24" Length 4-Pin Flat Connector
The Kooks universal 24-inch O2 sensor extension harness provides a clean, plug-and-play solution for relocating oxygen sensors during long-tube header installations on virtually any vehicle with a 4-pin flat-style connector (common GM, Ford, Chrysler, Toyota, Nissan, etc.). This extension prevents check-engine lights and lean/rich codes by maintaining perfect signal integrity while giving ample length for routing away from hot exhaust components.
Built from high-temperature shielded wiring with OEM-style weatherproof connectors rated over 1,200°F, the harness resists heat, vibration, and moisture for reliable performance in street, race, or off-road applications. The 24-inch length works with most header kits, and the flat 4-pin plug matches factory upstream/downstream sensors on hundreds of modern vehicles.
For builders needing a single, universal O2 extension that works across multiple platforms, the Kooks EX682-Z is the professional-grade harness trusted on thousands of Kooks header installations worldwide.
Key Features
- 24-inch overall length
- 4-pin flat OEM-style weatherproof connectors
- High-temp shielded wiring rated over 1,200°F
- Plug-and-play – no cutting or splicing
- Prevents CEL from O2 sensor relocation
- Universal fit for most modern 4-pin O2 sensors
Product Notes
- Universal application – verify connector style
- Sold individually – order quantity needed
- Compatible with Kooks and most aftermarket headers
California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.
Warranty: Limited lifetime against manufacturing defects to original purchaser.
Installation Notes
- Unplug factory O2 sensor
- Plug extension between harness and sensor
- Route away from exhaust heat
- Secure with zip ties
This Part Fits
| Application | Connector |
|---|---|
| Universal | 4-Pin Flat (Most GM/Ford/Chrysler/Toyota/Nissan) |
Note: Verify your O2 sensor uses the flat 4-pin connector.
What's Included in the Purchase
- (1) 24-Inch O2 Sensor Extension Harness
- Part Number: Kooks EX682-Z
Why Choose Kooks?
- Over 60 years of championship-winning exhaust engineering
- Precision wiring components tested in 1,000+ HP builds
- Limited lifetime warranty and expert support
Frequently Asked Questions
-
Q: What connector style?
A: Flat 4-pin (most common modern O2 sensors) -
Q: Length?
A: 24 inches end-to-end -
Q: One or two needed?
A: Most installs require two (one per bank)
Shipping & Handling
- Method: UPS or Fed Ex Ground.
- Availability: Typically ships same day or next if in stock.
- Packaging: Anti-static bag in protective box.
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