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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.
Both of those are going to be very loud in the car, for low interior resonance you would want to go with the 50 series. They sound great outside the car too and at WOT they're just as loud as the 40s...