CSF BMW E46 3-Series / 03-05 E85/E86 Z4 High-Performance All-Aluminum Radiator side splitter Left and right rear silencer

Left and right rear silencer sections with four 76 mm straight cut

Choose the Bilstein B6 rear damper if you want a high quality

Each fin configuration is carefully calculated and rigorously tested in CSF’s wind tunnel laboratory to ensure superior heat rejection performance

Why this upgrade belongs on your M140i

CSF BMW E46 3-Series / 03-05 E85/E86 Z4 High-Performance All-Aluminum Radiator side splitter Left and right rear silencerCSF brings over fifty years of expertise in radiator manufacturing, establishing itself as a leader in high performance cooling solutions. The CSF BMW E46 3 Series 03 05 E85 E86 Z4 High Performance All Aluminum Radiator is engineered to meet the demanding cooling requirements of both street driven and motorsport vehicles. This radiator is an essential upgrade for enthusiasts seeking enhanced thermal management, especially in high horsepower