Peterbilt 357/378 Coolant Reservoirs offer a comprehensive solution for your truck's cooling system needs. Designed to fit Peterbilt and Kenworth trucks, these high-quality coolant reservoirs provide reliable overflow storage and easy access for maintenance. With a sturdy black plastic construction and a convenient nipple for hose attachment, these reservoirs ensure optimal coolant levels and efficient engine cooling. Whether you need to replace a worn-out cap or add a remote-mounted surge tank, the Peterbilt 357/378 Coolant Reservoirs deliver the performance and durability your semi truck demands. Enhance your vehicle's cooling system and maintain peak engine operation with these top-of-the-line Peterbilt and Kenworth compatible parts.