B16, B18, B20
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By {ikon}EM1
#171054 will a b16 si harness fit a b18 gsr? are they the same?
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By Classiccarsrule85
#171130 seems like it would however i think there is a knock sensor in the block on the gsr that the b16 dosent have and i know since the gsr is well larger you will need to probaly extend some wires not all but yea overall itd be straightforward its almost like taking a d15 harness and plopping it on a z6 or y8

could be wrong but im 80% sure im right as far as i know as long as your matching obd it should be almost completely plug and play...
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By suspendedHatch
#171799 Huh? The B18 is larger requiring longer wires? ... ...

GSR has wires for intake manifold secondaries.