CSF 7064 High-Performance 2-Row All-Aluminum Radiator - 1999-2003 BMW 540i M/T (Fits A/T with Modified Drain Plug)

Fits 1999-2003 BMW 540i Base models.

The CSF High-Performance All-Aluminum Radiator (7064) is an essential cooling upgrade for the 1999-2003 BMW 540i (E39). Built for both spirited street use and demanding track applications, this radiator replaces the standard OE unit with a high-strength aluminum design that eliminates failure-prone plastic end tanks. While specifically engineered for manual transmission (M/T) configurations, it can also be adapted for use on automatic transmission (A/T) vehicles with a modified drain plug.

At the core of this radiator is a 42mm 2-row assembly featuring CSF’s exclusive B-Tube technology. Unlike standard "O" shape tubes, B-Tubes are seam-brazed in a "B" shape, which increases the heat transfer surface area by approximately 15% over traditional tubes. This design provides the efficiency of two smaller tubes within the same space, delivering superior heat rejection. The core is paired with ultra-efficient 6.5mm multi-louvered fins, precision-calculated in a wind-tunnel lab for maximum airflow and thermal performance.

• 2-Row 42mm core utilizing CSF exclusive B-Tube Technology
• CNC-machined "Quick-Connect" inlet and outlet connections for OE hose compatibility
• High-efficiency 6.5mm multi-louvered fins for optimized surface area contact
• Full all-aluminum construction with a durable satin finish
• Includes a race-style aluminum drain plug
• CNC-machined brackets and fittings for a direct, drop-in installation
• Accepts all factory components including AC condenser, mounting brackets, and fan shroud