The Mishimoto Performance aluminum radiator for BMW E46 non-M models is a direct-fit upgrade featuring a two-row brazed-aluminum core and polished end tanks. Engineered to lower coolant temperatures by about 19°F (10.5°C), it increases coolant capacity and surface area versus stock, and is offered in versions for manual or automatic transmissions with relevant inlet configurations for an easier installation.
Mishimoto 99-06 BMW 323i/323i/328i/330i w/ Auto Transmission Performance Aluminum Radiator