Know the landed cost before you order
Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.
Give the sensor leads the reach your header setup needs
The Kooks CAS-104110 supplies two 6" four-pin oxygen-sensor extensions for the listed RAM 1500 Classic 5.7 HEMI application. Use the matched extensions when header fitting moves the sensor connection further from the original wiring, or when existing extension leads need replacement.
SKU: CAS-104110
Extensions for your HEMI-swapped Jeep JK
These extensions also suit a Jeep JK Wrangler with a Gen III HEMI conversion. Match the installed engine and four-pin sensor connectors; this is an engine-swap application.
Match the connectors and route the leads carefully
Each lead has four-pin connectors and adds 6" of extension length. Match the actual sensor connection, then route the wiring away from hot pipework and moving parts. It is an extension harness, not a spacer or a device for changing the sensor reading.
Replacement leads when needed
Kooks header kits include O2 extensions where the application requires them. This kit is useful when matched leads are missing or damaged.
Vehicle fitment
| Years | Vehicle and trim | Engine | Applicable SKU / fitting conditions |
|---|---|---|---|
| 2018 | Jeep Wrangler JK | Gen III HEMI engine conversion | CAS-104110. Engine-swapped application only; match the four-pin sensor connectors |
| 2007-2017 | Jeep Wrangler JK | Gen III HEMI engine conversion | CAS-104110. Engine-swapped application only; match the four-pin sensor connectors |
| 2009-2023 | Dodge/RAM 1500 Classic body style | 5.7L HEMI V8 | CAS-104110. Two 6-inch, four-pin extensions; match the sensor connectors |
Ordering and delivery
Estimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.
Technical specifications
| Specification | Details |
|---|---|
| SKU | CAS-104110 |
| Listed application | RAM 1500 Classic 5.7 HEMI, 2009-2023; Jeep JK Wrangler with a Gen III HEMI conversion and matching four-pin sensor connectors |
| Contents | Two O2 extension leads |
| Length | 6" extension length per lead |
| Connectors | Four-pin connectors |
Frequently asked questions
How many leads are supplied?
Two, each with 6" extension length and four-pin connectors.
Does it stop an O2 fault or check-engine light?
It extends the wiring. It is not a calibration device or an O2 spacer.
Do I need a separate set with new Kooks headers?
The relevant header kits include extensions where required. Choose replacement leads if the matched originals are missing or damaged.
