RB20DET Swap Wiring Harnesses | Wiring Specialties About our RB20DET Wiring Harnesses and Swap Kits. Wiring Specialties RB20DET wiring harnesses are made of the highest quality materials and craftsmanship. Each and every harness carries an OEM fit and finish guarantee as well as an engine start-up guarantee and professional tech support.Skyline GTS R32 (Rhd) · 240Sx S13 Nissan - Nissan RB20 & RB25 & RB26 - Wiring Harness Get superior performance with Nissan aftermarket parts from Enjuku Racing. Shop tuner parts, Japanese performance parts & more. Join our Rewards Program & save! wiring a rb20 into s14 - Nissan Forum | Nissan Forums Jun 14, 2004hey i searched but i could not find anything for a complete wiring swap for a rb20 in an s14. i have done a couple of rb20 into s13s but never into a s14. is it pretty close? is there a 8step wiring guide like with the s13? any help would be great.