HOT RODS BOTTOM END KIT - 421-0233The Hot Rods Bottom End Kit is a complete crankshaft rebuild kit that gives engine builders every major component needed for a full bottom end installation in one package. Hot Rods Bottom End Kit includes your choice of a Heavy Duty OE replacement crankshaft or a Heavy Duty Stroker crankshaft plus main bearings, seals, and a complete engine gasket set. Everything fits together reliably so you don't spend hours cross referencing part numbers or waiting