We are cummins cylinder head & cylinder block manufacture in china ,4BT 6BT 6CT ISBE ISLE NTA855 3303 3304 ect good quality ! We are professional manufacturer of cylinder head and cylinder block Now we have developed Cylider head for Cummins 4BT, 6BT,6CT, ISBE, ISL, NTA855,6BT gas engine head,6CT gas engine head . Caterpillar 3304 and 3306 Cylinder block for Cummins 4BT 6BT 6CT ISL; Caterpillar 3304 and 3306 series All of our goods are made by CNC machine. Have strict control on each procedure to make sure about the quality. Also goods can be developed by sample and drawing Development Period : Cylinder head: half and two month Cylinder block: half and three month Here we can promise: We provide 1 year warranty for our goods! We are able to delivery the goods to you on time once you place the order ! We provider best service based on professional and sincerely attitude!