Kooks 2015+ Dodge Hellcat 02 Sensor Extensions

The Kooks oxygen sensor extension harnesses identified by manufacturer part number CAS-104322 is supplied in the exact configuration described as O2 Extension Kit for 2015+ Hellcat & 2018+ Trackhawk. Confirm the complete part number, application, connection points, emissions requirements, and included components before ordering.

Key Features

• The 8-inch length offers the exact reach needed for Kooks long-tube headers without excess slack that could cause chafing or shorts.
• The significant improvement in exhaust flow changes air fuel ratios and requires ECM recalibration to achieve optimal power output and safe operation.
• 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.
• 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.

Fitment

Specifications

What's Included

• 2) 6" Front Extension Harness (8-pin)
• 2) 18" Rear Extension Harness (4-pin)

About Kooks Headers

Kooks manufactures performance exhaust components in the United States, including headers, connection pipes, catalytic-converter assemblies, cat-back systems, mufflers, flanges, and installation hardware. Exact part-number verification is essential because similar-looking components can use different engine, chassis, emissions, and connection configurations.

Related Kooks Headers Products

• Shop Kooks Headers
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Frequently Asked Questions

Will this Kooks oxygen sensor extension harnesses fit my 2015-2020 Dodge Challenger?
That year, make, and model range is listed. Confirm the engine, emissions equipment, transmission, body configuration, existing exhaust, and exact Kooks part number before ordering.

Does this harness replace an oxygen sensor?
No. An extension harness changes connector reach for the specified installation and does not replace a failed oxygen sensor unless the exact product title states otherwise.

How should the harness be routed?
Keep it away from exhaust heat, sharp edges, moving parts, and tension. Secure the connectors and verify the wiring cannot contact the exhaust through the full range of movement.

Installation Instructions

1. Verify the exact part number, application, emissions configuration, connection sizes, and package contents before disassembly.
2. Support the vehicle safely and follow the factory service procedure together with the current Kooks instructions for this part number.
3. Test-fit every component before cutting, welding, or permanently tightening the exhaust system.
4. Route oxygen-sensor wiring and nearby hoses, lines, and cables away from heat, sharp edges, and moving parts.
5. Torque fasteners in the specified sequence, inspect for leaks and clearance, and recheck accessible connections after initial heat cycles.