At Mattoon Precision Manufacturing, Inc. (MPMI), they specialize in the precision machining of automotive parts - an operation that demands exactness - and they strive to ensure it through quality systems. They provide disk brake rotors, drum in disc brake rotors, ductile iron, steering knuckles, power steering, pump housings, bearing outer rings, engine covers differentials, machining and assembly, abs motor shafts, worm shafts output drive shafts, damper forks crankshaft brackets, vehicle vibration dampers, intake manifolds output manifold flange, adapters air conditioning compressor, front heads air conditioning compressor, rear heads, air conditioning, compressor front side blocks, air conditioning compressor, rear side blocks, air conditioning compressor, shafts forged steel hubs, ductile iron hubs, hub bearing assemblies, hub bearing rotor assemblies, lower control arms, aluminum bearing housings engine bracket assemblies.