BMW Z4 Radiator - CSF - All-Aluminum with 2-Row 42mm Core and 5mm Fin Technology - `19-`27. A high-performance, drop-in replacement for improved cooling on street and track.

This CSF unit uses new 5mm multi-louvered fins to expand heat exchange area while preserving airflow. The larger 2-row 42mm core adds fluid capacity and improves heat dissipation. CSF’s B-Tube technology increases heat transfer by about 15% versus standard oval tubes. Fully TIG-welded all-aluminum construction with CNC-machined brackets and OEM-style inlets/outlets adds strength and fit. Installs in the factory location with no cutting.

Features

• 2-row 42mm core
• 5mm multi-louvered fins
• CSF B-Tube (≈15% more heat transfer)
• 100% TIG-welded all-aluminum
• CNC brackets; OEM-style inlet/outlet
• True drop-in fit; leak/pressure tested

Questions or fitment help? Call us: Austin, TX 512-982-9393; Los Angeles, CA area 562-981-6800. Installation and customization at both locations.

Buying multiple items? Contact us for shipping discounts.

We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov