Cummins Engines, Filter, Compressor manufacturer / supplier in China, offering 4b Marine Engine Manifold Exhaust 3923312 3923313 3920941 3918926 for Boat, C Ummins Engine 4b3.9-G1 4BTA3.9-G1 4BTA3.9-G2 for Generator, Original 6c8.3 Cylinder Block 4947363 3971387 4993493 5289666 4089241 3965948 and so on.