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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.
Are you talking about the actual exhaust or just the tips because you don want 3in exhaust on a basically stock mustang, it could make it run bad because you will virtually have no backpressure. I run a 3in off road x-pipe but i havea need for it.
I guess i am confused. Do you mean you want to run 3 in pipes after the flowmasters. If that is the case that will no be a problem. I was assuming you had after market exhaust like headers, x or y pipe and you wanted to run a 3 in. x or y after the headers.