CSF 3055 Radiator for BMW 320i / 323 / 325 / 328 / 330 / Z4 1999-2003

With over fifty years of experience in radiator manufacturing, CSF is the obvious choice when it comes to ensuring your BMW E46 3-Series/Z4's engine cooling and maximum performance. Designed for track or street use, this high-performance, all-aluminum radiator is a must-have for both high-output engines and race cars that require enhanced cooling efficiency in motorsport conditions. This radiator features a 2-row core with CSF's exclusive B-Tube Technology: Unlike conventional "O" style radiator oval tubes, CSF uses specially engineered "B" shape tubes. These B-tubes are carefully brazed and sealed along their seam. CSF can use thinner, lighter aluminum material (with greater cooling efficiency) because this design is actually stronger than conventional "O" style welded tubes. The design (inlet opening in the middle of the tube, brazed along the seam) increases the surface area of the tubes' heat exchange by approximately 15% compared to conventional tubes – the efficiency of two smaller tubes compared to one larger tube within the same space criteria. With B-tubes, a "dual-flow" liquid laminar flow effect can be achieved. CSF also utilizes hyper-efficient fin stocks that are carefully and precisely aligned to maximize airflow through the radiator core. Fin characteristics are carefully measured and calculated for each application, and tested for maximum heat dissipation efficiency in a wind tunnel laboratory.

The CSF Radiator for BMW E46 3-Series/Z4 is a true "Drop-in fit" design, requiring no modifications for installation. OE-style mounting brackets are CNC-machined and welded for maximum strength. The inlet/outlet ports match the factory specifications, allowing you to use stock or aftermarket hoses. Trust the cooling experts at CSF for the most efficient, high-quality, and reliable radiators.

Applications

• 2000 BMW E46 323Ci - 2.5L L6 (Manual)
• 1999-2000 BMW E46 323i - 2.5L L6 (Manual)
• 2001-2005 BMW E46 325Ci - 2.5L L6 (Manual)
• 2001-2005 BMW E46 325i - 2.5L L6 (Manual)
• 2001-2005 BMW E46 325xi - 2.5L L6 (Manual)
• 2000 BMW E46 328Ci - 2.8L L6 (Manual)
• 1999-2000 BMW E46 328i - 2.8L L6 (Manual)
• 2001-2005 BMW E46 330Ci - 3.0L L6 (Manual)
• 2001-2005 BMW E46 330i - 3.0L L6 (Manual)
• 2001-2005 BMW E46 330xi - 3.0L L6 (Manual)
• 2003-2005 BMW E85 Z4 2.5i - 2.5L L6 (Manual)
• 2003-2005 BMW E86 Z4 2.5i - 2.5L L6 (Manual)
• 2003-2005 BMW E85 Z4 3.0i - 3.0L L6 (Manual)
• 2003-2005 BMW E86 Z4 3.0i - 3.0L L6 (Manual)

OEM Part Numbers

• BMW: 17119071518