1. genuine cummins parts 2. model 4B,6B,6C,NT855,KTA19,KTA38,KTA50 3. competitive price and qucik ... 4 102mm bore x 120mm stroke359-1 5.9 359 6B / 6BT / 6BTA 5.9 6 102mm bore x 120mm stroke ... ; 12 valve head359-2 5.9 359 6B/BT/BTA 5.9 ISC 6 102mm bore x 120mm ... free to contact us. Genuine cummins!! cummins engine parts 4B,6B,6C,6L,NT855,KT19,KT38,KTA50