• Welcome

    Welcome to your source for efi components. EFI Source is dedicated to supplying the highest quality EFI products to the performance minded automotive community. Our goal is to make programmable EFI systems affordable to everyone without sacrificing quality or functionality. We will constantly be adding new products in order to meet this goal.

MS3 LSX Plug and Play

The EFI Source MS3 Gold Series plug and play ECU  for LSX series motors is the most complete and cost effective system available on the market today. The Gold Series comes complete with a plug and play harness and a factory installed base tune. Simply connect a power, ground, and switched 12v and you will […]