Mishimoto MMRAD-E46-01 BMW E46 M3 Performance Aluminum Radiator, 2001-2006, Silver Direct fit for the 20012006 BMW E46 M3 Overall Size: 27.4 x 17 x 4.4 / Core Size: 22.83" x 16.14 / Rows: 2 Inlet & Outlet: Quick Disconnect / Core Thickness: 1.9 / Tank Wall Thickness: 0.08 32% increase in coolant surface area with a 25% increase in coolant capacity Mishimoto Lifetime Warranty