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Kooks CAS-104322 8-Inch Front Oxygen Sensor Extension Harness 5-Pin for 2015+ Dodge/Chrysler/Jeep 6.2L HEMI
The Kooks CAS-104322 8-inch front oxygen sensor extension harness resolves wiring length issues during header installations on 2015+ Dodge Challenger, Charger, Chrysler 300, and Jeep Grand Cherokee models with the 6.2L HEMI 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 6.2L HEMI owners upgrading to aftermarket headers who need a simple, reliable O2 relocation solution, the CAS-104322 harness delivers the essential wiring bridge for seamless installation and flawless engine management.
Key Features
- 8-inch length for precise front O2 sensor relocation
- 5-pin OEM-style connectors for plug-and-play fitment
- High-temperature shielded wiring rated over 1,200°F
- Vibration-resistant construction for track durability
- Maintains accurate air-fuel ratio readings and ECU function
- Direct replacement for lost or damaged extensions in header kits
Product Notes
- Front upstream sensor extension only and rear requires separate harness
- Designed specifically for Kooks header installations on 6.2L HEMI
- Inspect connections regularly to prevent heat damage
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
- Locate factory O2 harness and unplug sensor connector
- Route extension harness to new sensor location avoiding exhaust heat
- Plug into OEM harness and sensor and hand-tight, secure with zip ties
- Clear any codes and perform drive cycle for ECU relearn
This Part Fits
| Year | Make | Model | Submodel/Engine |
|---|---|---|---|
| 2015 and 2023 | Dodge | Challenger | SRT 6.2L HEMI V8 |
| 2015 and 2023 | Dodge | Charger | SRT 6.2L HEMI V8 |
| 2012 and 2021 | Jeep | Grand Cherokee | SRT8 6.4L HEMI V8 |
| 2018 and 2023 | Dodge | Durango | SRT 6.4L HEMI V8 |
| 2015 and 2023 | Chrysler | 300 | SRT 6.4L HEMI V8 |
Note: Front upstream O2 extension for Kooks header kits on 6.2L/6.4L HEMI. Verify connector type.
What's Included in the Purchase
- (1) 8-Inch 5-Pin Oxygen Sensor Extension Harness
- Part Number: Kooks CAS-104322
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 installation support
Frequently Asked Questions
-
Q: Is this for front or rear O2 sensors?
A: Front upstream only and rear requires CAS-104323 -
Q: Will it work with non-Kooks headers?
A: Yes, fits any 2015+ HEMI header with 5-pin O2 relocation -
Q: Does it affect tuning?
A: No, maintains OEM signal quality for accurate ECU readings -
Do Kooks headers require a tune after installation?
Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation. -
Will these headers void my factory powertrain warranty?
Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure. Consult your dealer for specifics on your situation. -
Q: Do these Kooks headers require a tune after installation?
A: Yes. A professional tune is strongly recommended after installing long tube headers. The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation. -
Q: Will Kooks headers void my factory powertrain warranty?
A: Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part unless they prove the component directly caused the failure in question. Consult your dealer for specifics. -
Q: What warranty does Kooks provide?
A: Kooks products are backed by a limited lifetime warranty to the original purchaser against defects in materials and workmanship. Racing and competition use applications may have specific warranty exclusions. Contact Kooks Performance directly for warranty details.
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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