The BESTfit Charge Air Cooler 40 x 25.75 In. with a 2.25 In. Core is an aftermarket option made to replace units on Kenworth T2000 trucks from 1998 through 2007. Built to meet original equipment specifications, this cooler has a core that measures 40 inches in height by 25.75 inches in width and 2.25 inches thick with 4-inch inlet and outlet connections, helping match common factory-style piping and maintain efficient charge air cooling. It is constructed with a heavy-duty design and tested to be 100 % leak-free, and it's intended to replace several OEM part numbers such as 4870800001, 4870805001, 4870810008, 4870810009 and related variants when proper OE numbers and dimensions are verified before purchase. You can choose to buy the cooler sold individually or as a complete kit that includes four heavy-duty clamps, two red silicone hoses and mount bushings to assist with installation. Both options come with a warranty against defects in workmanship and materials from the date of purchase. Before ordering, it's recommended to check your truck's specific fitment, dimensions and hose connection sizes to ensure this charge air cooler is suitable for your application.