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 Kit 2015+Hellcat/2018+Trackhawk 2) 6in. Front Extension Harness (8-pin) 2) 18in. Rear 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 Kit 2015+ Hellcat / 2018+ Trackhawk 2) 6" Front Extension Harness (8-pin) 2) 18" Rear 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 Kit 2015+ Hellcat / 2018+ Trackhawk 2) 6" Front Extension Harness (8-pin) 2) 18" Rear Extension Harness (4-pin). Extensions are included in Header kits where needed. This part is a replacment for damaged or lost Extensions.

O2 Extension Kit 2015+Hellcat/2018+Trackhawk 2) 6in. Front Extension Harness (8-pin) 2) 18in. Rear Extension Harness (4-pin). Extensions are included in Header kits where needed. This part is a replacment for damaged or lost Extensions.

O2 Extension Kit 2015+ Hellcat / 2018+ Trackhawk

Kooks 2015+ Dodge Hellcat 02 Sensor Extensions

O2 Extension Kit 2015+Hellcat/2018+Trackhawk

O2 Extension Kit 6.2L HEMI

O2 Extension Kit