TURBO KNOCK SENSOR for RB20 RB25 RB26 RB30 (VL and SKYLINE)Same sensor as fitted from factory Factory turbo engine ECU's use this sensor to detect knocks detonations, which can reduce the risk of engine damage Suits all RB20, RB25, RB26 and RB30 engines Can also be used on factory non turbo engines that have been converted to turbo Direct replacement aftermarket part Buyer will receive a part the same as shown We also sell the connector and loom kits to suit (Separately)