This wiring harness extension allows you to fit the high pressure fuel pump from the Z4/Supra (B58TU) engine to the original B58 without any need to cut your existing wiring.
This is 100% plug and play
Made using GENUINE BMW plugs and a heat resistant protective sleeve
Made in-house by Williams Performance
To fit:
B58
M140i / M140
M240i / M240
340i / 340
440i / 440
540i / 540