HOT RODS BOTTOM END KIT - 421-0146The Hot Rods Bottom End Kit is a complete crankshaft rebuild kit that gives you every part needed for a full engine overhaul, making it the go to Hot Rods bottom end crankshaft rebuild kit engine solution for serious wrenchers. The kit bundles a Heavy Duty crankshaft, main bearings, seals, and a full engine gasket set so you're not hunting down individual parts one by one. Rebuilds go smooth when you've got a matched set of components designed to work