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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
do the u/d pulleys. just slap a K&N filter into the stock airbox. the stock airbox starts to hold you back when you reach 300 crankshaft hp.
im running the stock box with 330 rwhp and it runs fine. I just open the fenderwell hole to the size of the box and it pulls more air then the CAI ever did