John at CBM

MEFIpro™ 1.0 software allows you to download the internal MEFI™ programming to your PC or laptop, change the operating parameters of the controller, and then reprogram the controller with your modifications. It also allows you to view all of you sensor systems in real time and log the data for later viewing. MEFI™ ECM Controllers are used in a wide variety of applications, including: Off-Road - Sand rails, Race Cars, Industrial Engines, and Crate Engines. Marine - MerCruiser, Indmar, and many boating applications. Compatible Windows Systems: Vista, Windows 7 and 8. more.
More info at www.MEFIpro.com

Skydawg

will it work on all versions of MEFI 5? A-D? will it include a basic LS3 tune?

John at CBM

Currently 5b and 6 only.