The Mishimoto Performance Aluminum Radiator for BMW E46 non-M vehicles is designed and engineered to reduce coolant temperatures by 19 F (10.5 C), and to protect your car from overheating during aggressive driving or hot lapping sessions. It is the ideal upgrade for your 3-series, and will outlast the weak stock plastic radiators. The Mishimoto E46 non-M radiator features a large two-row core, 100-percent brazed aluminum construction, and polished end tanks, resulting in greatly improved cooling efficiency for your engine. The engineers at Mishimoto designed this radiator to feature a 20-percent increase in coolant capacity over the stock radiator. The Mishimoto radiator also improves coolant surface are by 18-percent and air surface area by 41-percent. This aluminum radiator is an ideal upgrade to keep your E46 running cool! This innovative radiator design features CNC inlets and outlets that work perfectly with your stock plastic quick-disconnect Mishimoto E46 Non-M Radiator Hoses! The Mishimoto radiator comes in two separate versions for manual and automatic transmissions with the automatic transmission model featuring an auxiliary inlet port for the stock automatic transmission cooler connection. Every Mishimoto aluminum radiator is a direct-fit making installation effortless. This radiator includes the Mishimoto Lifetime Warranty, ensuring superb product quality and craftsmanship.