Nissan 240SX Performance Modification/Engine Swaps/RB20DET

thumb|right|400px|RB20DET in a S14 Specs and Versions Swap Guide The original items from the 240sx will work. All you have to worry about is the wiring harness, exchanging of cross members and steering rack. For a wiring harness you can either splice the KA harness with the RB (which can get hectic at times) or purchase a pre-made harness from a provider or specialist such as Wiring Specialties or run a standalone such as a Painless harness. Step by Step