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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.
3.73s, long tube headers W/H pipe, cat-back system.
Worth about 30hp. Get BBK headers for around 300$ + Flowmaster Cat-back for 270$.
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i agree with that for the most part. 3.73s if it is stick, 4.10s if it is AOD. longtubes w/ o/r x-pipe, good cat-back, bigger mass air meter, relocate thek&n into the fenderwell. thatsa pretty good start <IMG src=smileys/smiley4.gif border="0"></P>
Mustang Warehouse through Ebay has an entire MAC Exhaust system pretty cheap like less than 600 bucks. Mac shortie headers, macs pro chamber, and a mac cat back exhaust system.
One thing to remember, the engine works as a system. Anything you can do to make your engine "breathe" better will get you some nice power. Have fun with your stang.