Re: roush mustang value
One thing to keep in mind if you intend to modify is that the 5.4 4v has more ultimate potential that the 4.6 3v. Hellion Power Systems just released a twin turbo kit for the Shelby that takes them to 1,000 horsepower on the stock engine. And I believe Evolution performance has their Shelby in the 7's approaching 200 m.p.h. Obviously a ton of money there, but the point is there is also a ton of power hiding in those four valve heads.
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