NRA SURPLUS EQUIPMENT NRA Surplus Equipment offers Quality Rebuilt diesel engines for Heavy Equipment, Railroad Equipment, Marine, Transportation, Power Supply, and Air Compressors. All engines are Dyno tested prior to shipment and a copy of the test is sent with the completed engine. Engines can be set up with Mechanical or DDEC-2 controls We also offer Blocks, Cranks, Heads, Alternators, Starters, and Blowers.