CSF 7091 42mm High Performance 2-Row All-Aluminum Radiator for Select Audi & Porsche 2008-2021

Fits select 2008-2021 Audi A4, A5, A6, A7, Q5, S4, S5, SQ5, and Porsche Macan S/GTS.

The CSF 7091 High-Performance All-Aluminum Radiator is engineered for high-horsepower builds and motorsport applications that demand superior heat rejection. This unit features a massive 2-row 42mm core utilizing CSF's exclusive B-Tube technology. Unlike standard oval tubes, the B-tube design is seam-brazed for increased strength, allowing for thinner, lighter aluminum that improves cooling efficiency. This geometry increases the heat transfer surface area by approximately 15% compared to traditional O-shaped tubes, effectively providing the performance of two smaller tubes in the same space.

Designed for a true "drop-in" installation, the CSF 7091 requires no modifications. It is fully compatible with all factory components, including OEM "quick-connect" hoses, the AC condenser, mounting brackets, and the fan shroud. CNC-machined fittings ensure a precise, leak-free connection and factory-level durability under high-pressure conditions.

• Manufacturer Part Number: 7091
• 2-Row 42mm ultra-efficient core for maximum cooling capacity
• Proprietary B-Tube technology increases surface area by 15%
• 6.5mm multi-louvered fin height for optimized airflow through the core
• CNC-machined "Quick-Connect" inlet/outlet connections and mounting brackets
• All-aluminum race-style drain plug and smooth satin finish
• Retains all factory mounting points and cooling system accessories