how can I make my Ford-150 Harley Davidson edition faster?

chip it.. you can buy these on ebay relatively cheap, pretty significant gains in power, but poorer fuel economy.. also this could void your warranty..
 
You could put a chip in it which is pretty basic. K,n filter maybe 1-2 hp.Supercharge it which would cost alot! Duel exhaust is good for a few h.p. but is maximized with headers, intake, larger bore air intake for better overall flow and a chip for increasing fuel, injector duration and more aggressive engine timing.
 
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