![BMW Accessory Harness for the S58 and B58 motors](http://fuel-it.com/cdn/shop/files/IMG_5399.jpg?v=1713552636&width=1445)
Looking to install methanol, port injection, or some other accessory on your S58 or B58 equipped BMW and need a switched power source? Then you need our 12 volt accessory adapter!
If you need a switched power source to run your aftermarket accessories and don't want to run a wire through the fire wall to the fuse box we have the solution for you. Installation takes about 30 seconds and there is not cutting or splicing. Simply unplug the 4 pin connector on the ECU, plug in our fused adapter, and plug the ECU connector back in. You now have a 12 volt 10amp fused power source that is ready to use.
*Includes a 10 amp fuse
Compatible with the following:
-All B58 Gen 2 motors
-All S58 motors