CSF BMW F-Chassis Gen 1 B58 High-Performance All-Aluminum Radiator

CSF has built a reputation for producing the best B58 cooling systems on the market. Backed by years of experience and input from customers, race teams, and development partners, CSF leads the industry in Gen 1 B58 cooling technology.

As more enthusiasts push the performance limits of F-Chassis BMWs, the factory radiator has started to show its age. Increased boost and upgraded turbos generate significantly more heat, and the stock system can struggle to keep up. Combined with the heat exchanger mounted in front of the radiator, engine coolant temps can get too hot, especially during track use which can trigger limp mode.

On top of that, OEM plastic radiators degrade over time. With clogged tubes, damaged fins, and a higher risk of cracked tanks or gasket failure, replacing the stock radiator becomes essential for long-term reliability and performance.

Key Design Features:

• 20–25% increase in heat transfer efficiency using CSF’s exclusive 5mm fin technology
• Improved cooling performance to support high-boost, big-turbo builds
• All-aluminum construction for superior durability over OEM plastic tanks
• Designed to work seamlessly with factory or aftermarket heat exchangers

The original OE radiator from BMW is a plastic tank with a single row aluminum core design. While this is generally accepted as good quality and durable, there is always room for improvement. The 4.5mm fins on the OE radiator made the system fairly efficient for a factory unit. The core itself is one of the biggest limiting factors at only 34mm thick and a single cooling row.

Whether you’re building a street sleeper or prepping for your next track day, CSF’s Gen 1 B58 Radiator is engineered to handle the heat and then some.

• 2-Row – 42mm Ultra-High-Performance Core
• Cooling Tubes with CSF’s Exclusive B-Tube Technology
• New 5mm Tall Ultra Efficient Fins with a Multi-Louvered Design for Maximum Surface Area Contact
• CNC Machined Mounting Brackets and OEM Style Inlet/Outlet
• 100% All Aluminum TIG-Welded Construction
• Hand Brushed Satin Finish
• True Plug-and-Play “Drop-in Fit” Installation Requires Absolutely No Modifications
• Individually Leak and Pressure Tested
• 2-Year Limited Warranty

Applications:

2016-2019 BMW F3X 340i (incl. xDrive)
2017-2020 BMW F3X 440i (incl. xDrive)
2017-2021 BMW F2X M240i (incl. xDrive)
2017-2019 BMW F3X 330i w/ M Sport Package (incl. xDrive)
2017-2020 BMW F3X 430i w/ M Sport Package (incl. xDrive)
2017-2020 BMW F2X 230i w/ M Sport Package (incl. xDrive)

OEM Part Numbers:

BMW: 17118482623