I don't know anything about the 5.0. I know my car went from 301rwhp to 333rwhp after my longtubes were installed. I say that's a good increase. Only issue I have is ground clearance.
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2010 gt. Performance mods: ford racing hot rod cams, American racing longtube headers, 3" high flow catted American racing x-pipe, 3"piping back to borla type-s mufflers, ford racing k springs, Shelby sway bars, adjustable panhard bar, brembo shocks/struts, sumitomo 285/35/18 rear tires. cosmetic:gt4 replicataggered set, smoked raxiom headlights(galos off), raxiom tail lights.
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