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 Ford 1) 12in. Extension Harness (4-Pin) Round Connector. Sold individually. Oxygen Sensor Extension harnesses are included in Header kits where needed. This part number should Typically be ordered as a replacment for damaged or lost Oxygen Sensor Extensions. For installation of part # 11312000 or 11312200 on a 2005-2010 4.6L 3V Mustang GT with Automatic Transmission; 2 pcs required. No additional parts required for installation of part# 11312010.

O2 Extension Harness Ford 1) 12" Extension Harness (4-Pin) Round Connector. Sold individually. Oxygen Sensor Extension harnesses are included in Header kits where needed. This part number should Typically be ordered as a replacment for damaged or lost Oxygen Sensor Extensions. For installation of part # 11312000 or 11312200 on a 2005-2010 4.6L 3V Mustang GT with Automatic Transmission, 2 pcs required. No additional parts required for installation of part# 11312010.

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

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

O2 Extension Harness Ford 1) 12in. Extension Harness (4-Pin) Round Connector

O2 Extension Harness Ford 1) 12" Extension Harness (4-Pin) Round Connector

Kooks 05-10 Mustang GT 3V & 07-10 GT500 4V 12in - 02 Ext Harn -Each

O2 Extension Harness Ford

O2 Extension Harness