Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, "Get Kookin with KOOKS!"

O2 Extension Harness GM 1) 12" Front Extension Harness (4-Pin). Oxygen Sensor Extension harnesses are included in Header kits where needed. This part number should only be ordered as a replacment for damaged or lost Oxygen Sensor Extensions.

O2 Extension Harness GM 1) 12in. Front Extension Harness (4-Pin). Oxygen Sensor Extension harnesses are included in Header kits where needed. This part number should only be ordered as a replacment for damaged or lost Oxygen Sensor Extensions.

O2 Extension Harness GM 1) 12" Front Extension Harness (4-Pin). Extensions are included in Header kits where needed. This part is a replacment for damaged or lost Extensions.

O2 Extension Harness GM 1) 12in. Front Extension Harness (4-Pin). Extensions are included in Header kits where needed. This part is a replacment for damaged or lost Extensions.

Kooks 04-08 Cadillac CTSV & All Pontiac G8 12in - 02 Ext Harn Each

O2 Extension Harness GM 1) 12" Front Extension Harness (4-Pin)

2004-2008 Cadillac CTSV/All Pontiac G8

12in.-02 Ext Harness Each

O2 Extension Harness GM

O2 Extension Harness GM

O2 Extension Harness

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