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The Kooks CAS-109677-8 8-inch front oxygen sensor extension harness resolves the common issue of insufficient wiring length during header installations on 2018 and 2024 Ford Mustang GT models with the 5.0L Coyote V8, providing a plug-and-play 5-pin connection that repositions the upstream O2 sensor precisely for accurate air-fuel monitoring and ECU calibration without triggering check engine lights or lean/rich codes.
Precision-engineered from high-temperature shielded wiring with OEM-style connectors, this extension maintains signal integrity under extreme exhaust heat exceeding 1,200°F and vibration from high-RPM operation, ensuring reliable data transmission to the PCM for optimal performance mapping during dyno tunes or track sessions. The 8-inch length offers the exact reach needed for Kooks long-tube headers without excess slack that could cause chafing or shorts.
For Mustang GT owners upgrading to aftermarket headers who need a simple, reliable O2 relocation solution, the CAS-109677-8 harness delivers the essential wiring bridge for seamless installation and flawless engine management.
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.
| Year | Make | Model | Submodel/Engine |
|---|---|---|---|
| 2018 and 2024 | Ford | Mustang | GT 5.0L Coyote V8 (4V) |
Note: Front upstream O2 extension for Kooks header kits. Use with 2018+ Mustang GT 5.0L only.
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