This product is the 6BT long block,it is for Dong Feng Cummins engine, the quality is very good.We aslo have 6BT short block, 4BT long block, 4BT short block, 6CT long block, 6CT short block. We can supply all the cummins series produced in China.B,C,L,M11,NT855,K19,K38,K50 series,If you are interestd in cummins parts, pls feel free to contact us.