This high pressure oil pump is for the Navistar DT466E/I530 300-330HP engines. 1842723C91, 1826458C92. It is a 7.0cc high pressure oil pump. It is manufactured by Bosch and sold on an exchange basis, requiring that the old core must be returned. Simply return the old core with a return label that will be provided free of charge. CORE CHARGE: A core charge of $250.00 will be applied to your credit card account, if the core is returned within 30 days you will receive credit. Feel free to call our parts department at 800-891-8038 with any questions.