The Engine Oil Drain Valve is available in various sizes to fit most Heavy Duty Trucks engines, including Cummins, Caterpillar, Detroit Diesel, International, Mack and Imports. For the lists, go to Sizes & Applications. The Engine Oil Drain Valve for Heavy Duty Trucks and Fleets are available at a Fumoto Regional Distributors in your area. Find your area in Order/Dealer Inquiry.