CSF 7045 Race Radiator for CSF 7045 Racing Radiator for BMW 335i (E9x) / 1M (E82)

Part number7045

With over fifty years of experience in radiator manufacturing, CSF is the clear choice when it comes to ensuring your BMW 1M/135i/335i's engine cooling and optimal performance. Designed for track or street use, this high-performance, all-aluminum radiator is a must-have for both high-horsepower engines and race cars requiring enhanced cooling efficiency in motorsport conditions. This radiator features a 2-row core with CSF's exclusive "B-Tube" technology: Unlike standard "O" type radiator oval tubes, CSF utilizes specially engineered "B-shaped" tubes. These B-tubes are meticulously formed and then seam-soldered to seal. CSF can use thinner, lighter aluminum material (with greater cooling efficiency) because this design is actually stronger than standard "O" shape welded tubes. The design (inlet opening in the middle of the tube, seam-soldered) increases the surface area of the tubes' heat exchange by approximately 15% compared to standard tubes – the efficiency of two smaller tubes versus one larger tube within the same space criteria. With B-tubes, "dual-core laminar flow" can be achieved. CSF also utilizes highly efficient louvered fins 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 1M/135i/335i 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 are designed to match OEM specifications, allowing you to use OEM or aftermarket hoses. Trust the cooling experts at CSF for the most efficient, high-quality, and reliable radiators.