We have a large supply of Komatsu and Cummins engines to suit your replacement needs. Most engines are sold as complete running units including the crankcase, cylinder heads, oil pan, fuel injection pump and turbo (if applicable). We also offer engine components such as bare engine blocks, cylinder heads, injection pumps, cam shafts and connecting rods. We sell original Komatsu and surplus Komatsu replacement components. Our used engines carry a 30-day satisfaction guarantee. Our rebuilt engines carry a 90-day satisfaction guarantee.