Knock & Cam Camshaft Sensor Extension Wiring Harness LS1/LS6 to LS2 LS3 Knock sensor wiring harnesses with LS1 cam sensor adapter allows the cam sensor used on the front of a LS2/3/4/7/9 engine to be plugged into the LS1 cam sensor connector located at the back of the intake manifold. They are ideal for LS2/3/4/7/9 motor conversions and are compatible with the PCM harness in LS1/LS6 vehicles. Additionally, they include a knock sensor extension, which allows the single-wire LS1 knock sensors located on top of the LS1 manifold to be relocated on both sides of the LS2-series block, using the factory LS1 engine harness. Knock sensor wiring harnesses with LS1 cam sensor adapter have the correct length and thermal protection required when routing near hot engine components. Fitment LS2 engine with LS1/LS6 wiring harness Harness plugs in place of the factory LS1/LS6 knock sensor harness and extends to the knock sensor locations on the LS2 engine block.Commonly used with LS2 and newer engines installed in LS1/LS6 engine bays.