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Replace the front extension with the right Mustang connector
The Kooks CAS-109677-8 supplies one 8" five-pin front O2 extension for the listed 2018+ Mustang application. It gives the matched header installation the wiring reach it needs, with the exact connector and quantity clear before you order.
SKU: CAS-109677-8
Five-pin front connector
This is different from the six-pin 2015-2017 extension. Match the actual connector and model-year application, then route the lead away from hot pipework and moving parts.
Buy the quantity you need
The listing supplies one front extension. Order the quantity required for the installation or replacement job. Relevant Kooks header kits include extensions where the application needs them.
Vehicle fitment
| Years | Vehicle and trim | Engine | Applicable SKU / fitting conditions |
|---|---|---|---|
| 2018-2024 | Ford Mustang GT | 5.0L V8 | CAS-109677-8 |
| 2018-2024 | Ford Mustang GT Premium | 5.0L V8 | CAS-109677-8 |
| 2019-2020 | Ford Mustang Bullitt | 5.0L V8 | CAS-109677-8 |
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-109677-8 |
| Application | Listed Mustang application, 2018+ |
| Position | Front O2 sensor |
| Length | 8" extension length |
| Connector | Five pin |
| Quantity | One lead |
Frequently asked questions
Does it replace the earlier six-pin lead?
It is the five-pin 2018+ specification. Match the actual connector rather than treating the two year groups as interchangeable.
Does the listing supply both front leads?
It supplies one lead. Order the quantity needed for the installation.
Is it a calibration device?
No. It extends the sensor wiring.
