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World Products' Hardcore Man-O-War 427 is a bad dude. This one produces 525 hp and 505 lb-ft of torque with the use of an Eagle 4340 crank, Mahle coated pistons, 10.5:1 compression, and World Windsor Lite aluminum heads. The Hardcore 427 also comes with a single-plane intake and a Hardcore 1,050-cfm carburetor. Best of all, it's designed to run on pump gas.