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The CSF 31mm aluminum core is a big improvement over the factory core. A thicker core and increased fluid capacity drastically improves the amount of heat the system can absorb and dissipate. CSF’s Exclusive B-Tube Technology increases the heat transfer by approximately 15% over regular oval welded tubes. In addition, the super-efficient multi-louvered fins maximize airflow through the core for the best possible cooling performance.
The Focus ST was very well engineered and performed admirably out of the box. However, a few upgrades can quickly lead to heat issues, especially on the track or in hot climates. An upgraded radiator from CSF is the perfect solution.
The CSF #7238 Cooling product is designed to be a “Drop-In Fit” application. The product will install in the OEM Location with no modifications necessary unless otherwise noted or instructions are included in the product package. Please see the manufacturer repair manual for standard installation instructions. If you do not feel confident installing this product CSF recommends taking it to a qualified installation facility.

• Triple Pass Flow Configuration Allows Coolant to Flow Across the Core Three Times Before Exiting for Lowest Outlet Temperatures Possible
• 6.5mm Tall Ultra Efficient Fins with a Multi-Louvered Design for Maximum Surface Area Contact
• True Plug-and-Play “Drop-in Fit” Installation Requires No Modifications
• Cooling Tubes with CSF’s Exclusive B-Tube Technology
• 100% All Aluminum TIG-Welded Construction
• 1-Row – 31mm Ultra-High-Performance Core
• CNC Machined Mounting Pins and Brackets
• Individually Leak and Pressure Tested
• 2-Year Limited Warranty
• OEM Style Inlet/Outlet

The 2-Row 42mm aluminum core not only increases the fluid capacity of the radiator, but also improves the cores ability to dissipate heat. CSF’s Exclusive B-Tube Technology increases the heat transfer by approximately 15% over regular oval welded tubes. In addition, the super-efficient multi-louvered fins maximize airflow through the core for the best possible performance. Efficiency is key in off-roading as speeds tend to be lower overall so you end up relying on the fans to move most of the air over the radiator. While the factory fans do a decent job pulling air through the radiator core, it is still less airflow than you’d typically see in city driving. A larger and more efficient core will keep your engine temps in check and keep your engine running strong. Additionally, the end tanks are made from high grade aluminum and TIG welded to the core for extra strength. In contrast, the OEM crimped onto plastic end tank design is much weaker and creates a weak point where failure is more likely. Because the CSF radiator is designed as a true plug-and-play drop-in fit application, installation requires absolutely no modifications, trimming, or cutting.
CSF manufactures the most advanced and efficient radiator in the industry for your 4th Gen Subaru Forester. CSF uses innovative tube and fin technologies with industry-leading testing methods to maximize airflow and heat dissipation.
The CSF #7209 Cooling product is designed to be a “Drop-In Fit” application. The product will install in the OEM Location with no modifications necessary unless otherwise noted or instructions are included in the product package. Please see the manufacturer repair manual for standard installation instructions. If you do not feel confident installing this product CSF recommends taking it to a qualified installation facility.

• 6.5mm Tall Ultra Efficient Fins with a Multi-Louvered Design for Maximum Surface Area Contact
• True Plug-and-Play “Drop-in Fit” Installation Requires Absolutely No Modifications
• 2-Row – 42mm Heavy-Duty Ultra-High-Performance Dual Pass Core
• CNC Machined Mounting Brackets and OEM Style Inlet/Outlet
• Cooling Tubes with CSF’s Exclusive B-Tube Technology
• 100% All Aluminum TIG-Welded Construction
• Individually Leak and Pressure Tested
• 1-Hour “Mirror Finish” Hand Polish
• 2-Year Limited Warranty

CSF has over 5 decades of experience manufacturing radiators. So when it comes to keeping your engine cool and your N55 Powered BMW 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.
CSF manufactures the most advanced and efficient radiator in the industry for your N55 Powered BMW. CSF uses innovative tube and fin technologies with industry-leading testing methods to maximize airflow and heat dissipation.
The CSF #7078 Cooling product is designed to be a “Drop-In Fit” application. The product will install in the OEM Location with no modifications necessary unless otherwise noted or instructions are included in the product package. Please see the manufacturer repair manual for standard installation instructions. If you do not feel confident installing this product CSF recommends taking it to a qualified installation facility.

• “Drop-in Fit” Requiring No Modifications To Install – Accepts All Attaching OEM Components Including “Quick-Connect” Hoses, AC Condenser, Mounting Brackets and Fan Shroud
• Core Features an Ultra-Efficient Fin with 6.5mm Fin Height and Multi-Louvered Design for Maximum Surface Area Contact
• 2-Row 42mm Core (Dual Core) Featuring CSF’s Exclusive B-Tube Technology
• CNC Machined “Quick-Connect” Inlet/Outlet and All Aux. Connections
• CNC Machined Brackets and Fittings for Superb Fit and Durability
• Replaces OEM Part Number: 17118672103
• All-Aluminum Race Style Drain Plug
• Smooth Satin Finish

The 42mm 2-Row aluminum core is a massive improvement over the factory core. A thicker core, second cooling row, and increased fluid capacity drastically improves the amount of heat the system can absorb and dissipate. CSF’s Exclusive B-Tube Technology increases the heat transfer by approximately 15% over regular oval welded tubes. In addition, the super-efficient multi-louvered fins maximize airflow through the core for the best possible cooling performance.
The Focus RS was very well engineered and performed admirably out of the box. However, a few upgrades can quickly lead to heat issues, especially on the track or in hot climates. An upgraded radiator from CSF is the perfect solution.
The CSF #7239 Cooling product is designed to be a “Drop-In Fit” application. The product will install in the OEM Location with no modifications necessary unless otherwise noted or instructions are included in the product package. Please see the manufacturer repair manual for standard installation instructions. If you do not feel confident installing this product CSF recommends taking it to a qualified installation facility.

• Triple Pass Flow Configuration Allows Coolant to Flow Across the Core Three Times Before Exiting for Lowest Outlet Temperatures Possible
• 6.5mm Tall Ultra Efficient Fins with a Multi-Louvered Design for Maximum Surface Area Contact
• True Plug-and-Play “Drop-in Fit” Installation Requires Absolutely No Modifications
• Cooling Tubes with CSF’s Exclusive B-Tube Technology
• 100% All Aluminum TIG-Welded Construction
• 2-Row – 42mm Ultra-High-Performance Core
• CNC Machined Mounting Pins and Brackets
• Individually Leak and Pressure Tested
• 2-Year Limited Warranty
• OEM Style Inlet/Outlet