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A familiar face is always nice to see, especially when it's the supercharged, Four-Valve, 5.4-liter engine that I adore. Better yet, it makes more power and gets better mileage. Not only does this engine deliver 540 hp and 510 lb-ft of torque in stock form, it has such a huge upside when tuned up. The better economy even means you pay a smaller $1,000 gas-guzzler tax. Most of the underhood appears to be carryover, save for the new induction system and the battery cable routing. Noticeably absent despite all the talk about a stiffer chassis is the strut-tower brace that was de rigueur on the '07-'09 GT500s. It appears the new induction system and perhaps the new hood might preclude the bar.