CSF has over 5 decades of experience manufacturing radiators. So when it comes to keeping your engine cool and your Audi running at its best, a CSF High-Performance All-Aluminum Radiator is the obvious choice. Designed to perform on the street or at the track, a performance radiator is a must-have for both high horsepower builds as well as race vehicles which need added cooling performance in motorsports environments. This radiator features a 2-Row core with CSF's exclusive B-Tube Technology: Unlike a regular oval shape "O" type radiator tube, CSF uses a specially engineered tube in the shape of a "B". These "B-tubes" are carefully formed and then brazed over the seam to seal. CSF is able to use thinner and lighter aluminum material (with better cooling efficiency) because this design is actually stronger than normal "O" shape tubes that are welded. The design (inlet in the middle of the tube that is seam brazed) increases the heat transfer surface area of the tubes by approximately 15% over regular tubes - producing the efficiency of two smaller tubes vs. one large tube within the same space criteria. With "B-tubes" you are able to get "dual liquid laminar flow". CSF also uses ultra efficient multi louvered fins that are carefully and precisely aligned to maximize airflow through each radiator core. Fin specifications are carefully measured and calculated for each application, and tested for maximum heat rejection efficiency in our wind-tunnel lab.The CSF Audi radiator is a true "Drop-in fit" design requiring no modifications to install. OE style brackets are all CNC machined and welded for the best durability possible. Inlet/Outlet connections are designed to match the OE connections so you can reuse OEM hoses or aftermarket. In addition, CSF has added an upgraded plate-type transmission oil cooler to the left side tank for improved transmission cooling in vehicles with automatic transmissions (comes pre-plugged for use in manual transmission vehicles).
• 2-Row 42mm High-Performance Core Featuring CSF’s B-Tube Technology
• Core Features Ultra Efficient 6.5mm Tall Fins with a Multi-Louvered Design for Maximum Surface Area Contact
• 100% All-Aluminum TIG-Welded Construction
• CNC Machined Mounting Brackets and OEM Style “Quick Connect” Inlet/Outlet
• Integrated High-Performance Transmission Oil Cooler for Both Automatic and Manual Transmissions
• Integrated OEM Style Wire Harness Brackets
• True “Drop-in Fit” Requires No Modifications to Install
• Individually Leak and Pressure Tested
• 1 Hour “Mirror Finish” Hand Polish
• 2 Year Limited Warranty
Vehicle Fitment:
- 2010-16 Audi (B8) S4
- 2009-14 Audi (B8) A4 Quattro
- 2010-14 Audi (B8) S5
- 2008-16 Audi (B8) A5
- 2008-14 Audi (B8) A5 Quattro
- 2010-13 Audi A6
- 2016 Audi A6
- 2012-15 Audi A6 Quattro
- 2016 Audi A7
- 2012-15 Audi A7 Quattro
- 2009-17 Audi Q5
- 2014-17 Audi SQ5
- 2015-18 Porsche Macan S & GTS
OEM Part Numbers:
- Audi: 8K0 121 251 AL
- Audi: 8K0-121-251-AL
- Audi: 8K0121251AL
- Audi: 8K0 121 251 H
- Audi: 8K0-121-251-H
- Audi: 8K0121251H
- Porsche: 9A7 121 251 01
- Porsche: 9A7-121-251-01
- Porsche: 9A712125101
