Premium 24" O2 Oxygen Sensor Extension Harness Camaro Firebird LS1 LS2 LS6 This package includes two premium oxygen sensor extension cables for GM LS engines. The Premium extensions feature a fiberglass heat resistance sleeve to protect the wires from the heat generated by aftermarket Headers and H-Pipes. When you install most aftermarket headers, it moves the oxygen sensor bungs towards the rear of the car, farther from the factory harness, so extensions are required. These extensions make the installation hassle free by not having to cut and splice the factory wiring. It also makes removing aftermarket headers much easier. Includes Two 24" Cable Extension · This is the Black Square 4-pin plug. Make sure your oxygen sensors have a Black plug as they are different thatn the Gray Square 4-pin found on some vehicles. · Uses the same GM Factory Delphi/Packard connectors, terminals and seals as the OEM wiring harness · High Quality, Heat Resistant, Heavy Duty Construction 1998-2002 LS1 Camaro & Firebird 1993-1997 LT1 Camaro & Firebird 1997-2004 LS1/LS6 2005-2008 LS2/LS3/LS7 2004-2006 LS6 & LS2 Pontiac GTO 1997 - 2003 Corvette Downstream Only These oxygen sensor extensions will make for an easy installation and will avoid the problems of faulty O2 sensor readings that are common with cutting and splicing. These are a must for any long tube header installation!