Big Bear Engine Company specializes in new surplus Cummins 4BT, 6BT (5.9 L) and Caterpillar 3306 diesel engines for industrial and jeep swaps uses.
We specialize in new surplus Cummins 4BT, 6BT and Caterpillar 3306 diesel engines. In addition to surplus engines we are also a full service machine shop and engine remanufacturing facility. All machine work is done in house in Denver, CO. We also are a dealer for aftermarket parts with over 100,000+ parts available for all of the biggest diesel engine brands including Caterpillar, Cummins, Detroit, International, John Deere and Mack.
