Power for the Trans Am 455 Super Duty comes from a 455-cubic-inch (7.4-liter) version of GM’s current Generation V LT1 V-8 engine topped off with a Magnuson TVS2300 supercharger that provides 14 psi of boost — that’s 0.5 psi less than the new Challenger SRT Demon. A cold air intake and ceramic coated headers and 3.0-inch exhaust brings power to 1,000 hp and 1,046 lb-ft of torque, or 160 hp and 276 lb-ft more than the Demon on race gas and 192 hp and 329 lb-ft more than the Demon on 91 octane.