Are you planning on swapping an M20, M30, M42 or S38 engine into your e21? If so, these E21 engine swap harnesses are intended to make your engine swap a much easier process. They include the square E21 connector & round C101 connector. Instructions are included. With this simple plug-and-play adapter, you won’t have to deal with any wiring headaches. These adapters do not come with any sensors. If you have any special requests, feel free to contact us.

• Installation Instructions included
• Sensors are not included
  

* This is a special order item, please allow 2-3 weeks for assembly. All adapters are made to order. Because of this, neither returns nor exchanges are accepted.  All sales are final.