Muzzys GTO CTS-V Corvette LS1, LS2, LS6 24" O2 Oxygen Sensor Extension Wire Harness Gray GM 4-Pin Square 02 Sold individually. Order any quantity you need. Made in the USA by Muzzys! The additional 24" length these harnesses provide allow the O2 sensors to simply plug back in from the new location, designed with OEM harness connectors for simple installation. This extension fits 04-08 LS1 and LS2 GTO front O2 sensors, 05-08 C6 Corvette rear O2 sensors, LS6 CTS-V applications as well as many other GM applications using the 4 pin SQUARE "GRAY" connector which is not the same as the "BLACK" connector. "BLACK" connector extensions are also available in our store. Please physically check your connectors before ordering. See photo "2" to make sure your connectors are the same! This Muzzys o2 sensor extension was manufactured using high temperature cross-linked polyethylene TXL wire & OEM Delphi-Packard connectors, pins and seals to ensure a secure, long lasting, moisture free connection. These are the same components used by GM on the factory harness. High Quality, Heat Resistant, Heavy Duty Construction!