Doing the wiring for an sr swap can be a daunting task especially for those who do not want to deal with figuring out which wires to cut extend here at frsportcom we will walk you through the wire harness modification so that your engine will start on the first try this guide is for swapping an s13 sr motor into an s13 240sx chassis. This wiring specialties pro series wiring harness is designed from the ground up specifically for a us model lhd nissan 240sx s13 with an rb20det engine swap it was developed in house on an actual rb20det engine to ensure a perfect fit to the engine and chassis. Rb20det remove or cut diode d311 located top side of ecu near ecu plug and t300 transistor this diode motor swaps for a 87 200sx yeah i know i could fit in a ca18det and a sr20 but they arent going to give me the high hp output that i want the rb20 is a canadate for me but id rather not put it in if i put a rb motor in itll be the rb25. Nissan knock sensor connector to suit rb20 rb25 and ca18 engines connector comes with connector housing terminals and seals please check your original connectors shape and keying before purchasing
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