This is a Pro Flow Mass Air removed from a 5.0 Cobra kit car motor (that we put in our Fox Bird). It has very few miles on it, however, the air filter is nicked up from the small Cobra engine compartment. This Pro-M unit is calibrated for 89-95 Mustang motors with 36# injectors and, according to their website, is capable of supporting up to 800 flywheel HP. $150
http://www.promracing.com/mass-air-meters-c-2/pro80-p-5