The Ranger bottom end assembly is the preferred basis for performance 2.3 Duratec engines. Unlike the US Focus and Transit bottom ends, it does not have a power sapping balance shaft assembly and therefore the crankshaft does not incorporate a drive gear. This gives the Ranger crank a 2.3kg weight advantage over the other cranks. A Ford built bottom end assembly comprising of block, Ranger style crankshaft, pistons, con rods and bearings. An ideal basis for converting a 2.0 engine to 2.3.