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2003 mustang gt 3 valve swapped
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Hi there, maybe add a cold air intake ,aftermarket exhaust, better coils & plugs & injectors while having the cams put in get a new water pump & oil pump , maybe an upgraded radiator & hoses etc ,new alternator & change out the fuel filter.. I’m just going by the mileage you said the car has on it & don’t know what you’ve already replaced .. as far as where to look & buy there’s so many options available out there .. on my car I’ve done a little bit of new mixed with some used parts to keep my costs down .. I bought off Amazon , Ebay American muscle, LMR , blu auto parts .. even some other parts from Facebook marketplace.. I drove as far as 3-4 hours away for some wheels/tires but they were an awesome deal was well worth it. All depends on what you need or want and your budget and time. Hope this helps & good luck with the build..
 
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