BMW E46 LS1 Wiring Harness | Wiring Specialties Our Pro Series harness completely replaces your old OEM harness so you can forget about those electrical gremlins. This harness is perfect for a BMW E46 1999-2006 with the GM LS1 Cable Throttle engine swap. This harness was developed in house on an actual LS1 engine to ensure a perfect fit to all engine connections. BMW E36 LS1 / Vortec Swap Wiring Harness | Wiring Specialties Brand new BMW E36 LS1 / Vortec swap wiring harness. This tucked, plug and play wiring harnesss is made in the USA from the ground-up and is designed to exceed OEM specifications for wire quality and routing. Includes detailed instructions and a start up guarantee.