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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.
Hey guys, I had an O/R h-pipe and had terrible idle issues, but would idle fine most of the time with the A/C on! Now I recently installed the original midpipe and the car idles perfectly @ 750rpms without A/C and dies with