Do you have a Mustang that you use only for racing? Then why don't you get rid of the air pump? They're not needed on racing vehicles, and you will reduce the front-end weight, too. These Ford Racing smog pump eliminator bracket idlers are direct bolt-on replacements for stock air pumps, and they use the stock serpentine belt.

This Part Fits:

Year	Make	Model	Submodel
1979-1981	Ford	Mustang	Base
1981	Ford	Mustang	Cobra
1979-1981	Ford	Mustang	Ghia
1982-1983	Ford	Mustang	GL
1982-1983	Ford	Mustang	GLX
1982-1993	Ford	Mustang	GT
1984	Ford	Mustang	GT-350 20th Anniversary
1982,1984	Ford	Mustang	L
1984-1993	Ford	Mustang	LX
1993	Ford	Mustang	SVT Cobra
1993	Ford	Mustang	SVT Cobra R
1984	Mercury	Capri	RS