This aftercooler is designed to fit Cummins 4BT 6BT engines with precision and accuracy. Manufactured in China, it is a reliable and durable part for your heavy equipment. It is perfect for those who need to replace their aftercooler and want to ensure that it fits perfectly in their engine. The model number for this aftercooler is 3919806 5262611 4941638. It is compatible with Cummins 4BT 6BT engines and is made with high-quality materials. This aftercooler is a crucial component for your heavy equipment and will ensure that your engine runs smoothly and efficiently.