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CSF Radiators High-Performance Auxiliary Radiator for BMW F8X M3/M4/M2 Comp 2015-2021 - 8258

Upgrade Your Cooling System with CSF's High-Performance Auxiliary Radiators

If you're driving a BMW F8X M3, M4, or M2 Comp, you know that the factory auxiliary radiators do a decent job under normal conditions. But as you start pushing your S55 engine to its limits—whether on the track or during spirited drives—the OEM cooling system may struggle to keep up. Over time, the stock coolers can suffer from clogged fins and reduced efficiency, especially in vehicles that are now several years old. This is where CSF's High-Performance Auxiliary Radiators come into play.

Fitment

These radiators are designed as a direct replacement for:

  • BMW M2 (2019-2021)
  • BMW M3 (2015-2018)
  • BMW M4 (2015-2020)

Performance Features

The CSF radiators are engineered for a true "drop-in fit," making installation straightforward with no modifications required. They utilize OEM quick connections and mount perfectly in the factory locations. Here’s what sets them apart:

  • Significant upgrade over OEM coolers with a 7% increase in core size and a 10% increase in tank volume.
  • 2-row 42mm core featuring CSF's exclusive B-Tube technology for enhanced airflow and heat dissipation.
  • All-aluminum construction ensures durability, with stronger mounting pins and brackets compared to the OE plastic system.
  • Integrated rock guards protect against road debris, preventing punctures that could lead to catastrophic fluid loss.
  • Satin black finish for a stealthy, OEM+ appearance.

Technical Specifications

  • Core Height: 177mm
  • Core Thickness: 42mm
  • Core Width: 236mm
  • Core Material: Aluminum
  • Core Row Quantity: 2
  • Inlet/Outlet Connection Type: OE Type Quick Connect
  • Inlet Diameter: 16.3mm (Top)
  • Outlet Diameter: 16.3mm (Bottom)
  • Installation Type: Drop-In Fit Installation
  • Includes Detachable Rock Guard

Customer Feedback

BMW M3 owners have reported noticeable improvements in cooling performance during track days. One owner stated, “After installing these CSF radiators, my track sessions are uninterrupted. No more cooldown laps, just pure driving.” Another M4 driver mentioned, “The fit was perfect, and I love the sleek black finish. It looks great behind the grille!”

Why Choose CSF?

CSF is known for manufacturing some of the most advanced cooling solutions in the industry. Their commitment to quality and performance means you can trust these radiators to keep your engine temperatures in check, allowing you to focus on what really matters—driving.

Upgrade your BMW F8X cooling system today with CSF's High-Performance Auxiliary Radiators and experience the difference on your next drive!

Other Part Numbers:
CSF Radiators #csf8258

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2019-2021
 BMW M2
2015-2018
 BMW M3
2015-2020
 BMW M4
CSF Radiator

Anyone who needs a new radiator should consider buying a CSF radiator. A CSF radiator and CSF cooling system offers the best performance for driving and racing enthusiasts. If you have a faulty radiator or are looking to upgrade to a high-performance radiator, a CSF radiator will get the job done. 

What is a CSF Radiator?

During the last 40 years, CSF has manufactured over 10,000 different models of radiators, oil coolers, heat exchangers and condensers for Automotive, Truck, Industrial and Marine applications. Today, their products are sold in over 60 countries throughout the world. Their US Aftermarket Division stocks over 1000 models that cover over 2100 applications for all popular Import vehicles.

CSF supplies radiators and condensers that are designed to meet or exceed original equipment (OE) engineering specifications. Their plants meet ISO 9000 standards and provide parts to OE manufacturers, and to top it all off - check out their industry leading warranty. Simply put, you cannot buy, sell, install or own a better value radiator or condenser.

Why Should I Buy a CSF Radiator? 

A CSF radiator offers a number of benefits over the competition. Below, we explain the main reasons why you should buy a CSF radiator.

A Market Leader for over 45 Years

CSF has been a market leader for over 45 years, as the company was initially established in 1975 and have been selling CSF radiators ever since. Over time, a CSF radiator has become known for its innovative design and impeccable quality.

High-Quality Radiator Testing

Every single CSF radiator and CSF cooling system has been put through a rigorous series of tests to make sure every system is reliable and performs at a high level. In their testing lab, CSF puts in the time to make sure every product works perfectly. 

Cutting-Edge Technology

Each CSF radiator uses cutting-edge technology to bring customers the best CSF full cooling system possible. CSF racing radiators combine a high-efficiency core, advanced endtank designs, and innovative design and engineering to give our customers the most advanced and efficient radiator possible.  

Get a CSF Radiator or CSF Cooling System From Vivid Racing 

Vivid Racing carries a wide selection of CSF radiator products, including CSF cooling systems and other accessories. If you are interested in learning more or would like to purchase a CSF radiator, please contact Vivid Racing today by calling (480) 966-3040.

CSF takes pride in the quality of its products and offers one of the best warranty’s in the industry. Please refer to the CSF warranty card in the shipping carton for details.

CSF warranty is applicable only to the original owner of the vehicle. Original paper work verifying the proof of purchase and pre-installation cooling system checklist signed by the professional installer is required to process warranty claims.

All warranty claims should be directed to the point of purchase. Due to CSF’s established agreements with Authorized CSF Warehouse Distributors, CSF is unable to handle and/or process warranty related calls/inquires from any individuals – all inquires/warranty related claims should be directed to the point of purchase or an authorized warehouse distributor.

Take care of your radiator, as under circumstances listed below the warranty will be void.

If the radiator is installed and is returned deformed (bulging tanks, warped core etc.), this is an indication that the radiator is the victim of some other problem and not the cause. The deformation is a result of the radiator being subjected to extremely high pressure and or temperature caused by any of the following reasons:Defective Pressure Cap, Defective Head Gasket, Defective Temperature gauge (incorrect readings), Defective Water Pump etc. Such units are not covered under the warranty.

If a radiator seems to have a “fit problem” there is the possibility that there is some confusion about a multi-fit radiator that might look different. Your nearest CSF WD can clarify the application, just give them a call. A perceived fit problem is not covered under warranty.

If a unit is damaged in shipping, please file a claim with the carrier. Damages caused during shipping, installation or handling are not covered under warranty.

Any repairs or alterations to the unit will automatically void the warranty.

Any form of abuse, including the use of improper coolant mixtures, damage caused by steam, corrosion etc and use on commercial vehicles voids the warranty. It is the vehicle owners’ responsibility to maintain the cooling system as specified in the owners manual.

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