Sale

Air and Fuel› Oxygen Sensors, Controllers and Components

Kooks

O2 Sensor Extension Harness, 18-Inch 4-Pin

$27.29 $24.00 Save $3.29

SKU: CAS-109010-18

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Kooks O2 Sensor Extension is an 18-inch, flat 4-pin harness designed to extend oxygen sensor wiring for GM LT1 and LS1 engines. It ensures proper connection when installing aftermarket headers or exhaust components that require additional wire length. This extension is crucial for maintaining accurate sensor readings and optimal engine management.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandKooks
Part NumberCAS-109010-18
CategoryAir and Fuel

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy