... we have developed: Cylinder head for Cummins 4BT,6BT, 6CT, ISBe, ISLe(T375), NTA855,6BT natural gas engine head, 6CT ... natural gas engine head. Caterpillar 3304 and 3306 series. Cylinder block for Cummins 4BT ... the quality(Three-coordinate measuring machine)Production capacity: cylinder head:3000pcs/month, cylinder block:1000pcs/mont For ordering our goods, ...