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The Coyote 5.0 may be a bit more efficient, but don’t think this 5.4 GT500 mill is some sort of under-achiever. To date, Kenne Bell has made more total power with the larger 5.4—over 800 hp at the tires—than with the 5.0. A well-sorted package, the KB-assisted GT500 Shelby is a house-broken daily driver. KB notes its gotten an extra 25 rwhp from the GT500 with funny cams, but with a lope that’s harder to live with.