550hp isn't cheep to do with a powerstroke. You may have gotten lucky and have forged rods instead of PMr being a 99. I would still look though. Obviously you need more fuel and air to make your goal. I would also look into tranny upgrades to. Price all depends how wild you want to get.
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2001 f350 crew cab platinum ed. 12v cummins he351 over s475 stage 3 colt cam 5x.014 injectors. P pump 700cc arp head studs airdog 150 water meth . Fully built 4r100 with stand alone computer. Some secret squirrel stuff.
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