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A Gen VI 454 pulled from a salvage yard produced 370 hp in baseline form. Tested with four successive power-adders, the junkyard big-block reached 832 hp and 866 lb-ft of torque on twin turbos at 12.3 psi.

Dyno testing on an LS3 crate motor showed that upgrading from stock valvesprings to Comp Cams beehive springs cost 4 hp above 5,500 rpm - a minor trade-off that enables cam upgrades worth 70-plus horsepower. A Speedmaster fabricated intake supported the high-rpm cam testing.