The Heavy Duty Pressurized Coolant Reservoir, No. 603-1316, from Dorman Products is a replacement engine coolant reservoir manufactured from quality materials. It is engineered to withstand underhood stresses such as extreme temperatures and engine vibration. This direct replacement is designed to match the fit and function of the original part with seamless installation. Features a maximum pressure rating of 20 psi and a 12.8L capacity.