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Try using the search tool for (Insert your engine size here) performance. otherwise the standard upgrades apply, exhaust, cold ait intake, chip and cam, or better than a chip is a programmer. Do some searching, then post with questions.
Headers intake and exhaust would be my first mods.....as for lift crank torsion bars, if your year has them not sure....or you could go with a body lift which runs about 150-200$
Well nobody told you any cheap mods all of those arent too cheap, Making a CAI is cheap or you can go with a k&n round filter for that old school look. If you can, gut the cat depending on your emissions, try finding a used Mopar PCM or Superchips tuner. just to get a little extra grunt and sound throw a hooker aerochamber muffler in place of the stocker or a 18" magnaflow 2.5" inlet and outlet.