Both cars boast a variant of GM's late-model LS-series engine. The Impala runs an LS1, a takeout from an '01 Vette; the wagon, a 6L LS3. As delivered by Turn Key Engine Supply, the wagon's 6.2 churns a more-than-healthy 480 right out of the crate. In stock form, the LS3 trumps the Impala's LS1, but a Magnuson Magna Charger with which the Timeless crew endowed it transforms the smaller 5.7 engine into a 500hp killer. An air-to-water intercooler directly under the Impala's blower plumbs to a heat exchanger mounted ahead of the radiator and condenser. The Impala has an Arizona Speed & Marine accessory drive; the wagon, a Billet Specialties Tru Trac.