CSF 7046 High-Performance All-Aluminum 42mm Radiator for Select 2007-2016 BMW 135i, 335i, X1, & Z4 (A/T Only)

Fits select 2007-2016 BMW 135i, 135is, 335i, X1, and Z4 (A/T Only).

The CSF 7046 High-Performance All-Aluminum Radiator is engineered for enthusiasts demanding superior cooling for high-horsepower builds and motorsport applications. This radiator replaces the factory unit with a direct "drop-in" fit, utilizing CNC-machined quick-connect inlet/outlet connections to accept all OEM hoses, mounting brackets, AC condenser, and fan shrouds without modification.

At the core is CSF’s exclusive B-Tube technology. Unlike standard "O" shaped tubes, B-Tubes are formed and brazed over the seam, creating a stronger structure that allows for thinner, lighter aluminum and 15% more heat transfer surface area. The 42mm 2-row core works in tandem with ultra-efficient 6.5mm multi-louvered fins to maximize airflow and thermal rejection, keeping coolant temperatures stable even under extreme track conditions.

• CSF Part Number: 7046
• 2-Row 42mm Core featuring exclusive B-Tube Technology
• 6.5mm multi-louvered fins for maximum heat rejection surface area
• CNC-machined brackets and fittings for a precise, durable fit
• CNC-machined "Quick-Connect" inlet/outlet connections
• All-aluminum race-style drain plug included
• Finished in smooth satin aluminum
• Designed specifically for Automatic Transmission (A/T) models