Pro-M Maftuner V 1.2 (last version)

What you see is what you get. It's a sweet little job for tuning the fuel system. YOu can adjust the base fuel mix mid and wot , you can also program the MAF transfer voltage to whater you like via the supplied Com to USB cable. It will work on pretty much any car all of the MAPS and presets are for Ford vehicles though.

$200 O.B.O.

Here's a little article on it and how to install it on a 5.0 which is nice because the instructions it comes with are very vague.

138 0306 Maf Lead Z Photo - 5.0 Mustang & Super Fords Magazine Article at Automotive.com

As most of you may know Pro-M is no longer in business. Mass Air Systems took them over and is STILL making the Maftuner to this day. I believe Coastal is a dealer for them too..