8258 BMW F8X M3/M4/M2 Comp High-Performance Auxiliary Radiator

Market Description: Compared to the OEM F8X coolers, the CSF units are a significant upgrade. CSF eliminated the OE plastic mounting pod by incorporating it into the modular design that fits both sides. This design improvement increases the size of both the core and tanks. The extra space taken from the mounting pod allowed for a 7% increase in Core Size and an 10% increase in Tank Volume. With a larger 2-row 42mm core, cooling efficiency and capacity are drastically increased. The high efficiency core using CSF's Exclusive B-Tube Technology maximizes airflow and heat dissipation. 100% All-Aluminum construction ensures the best performance and durability. The mounting pins and brackets are much stronger and more durable than the OE plastic pod mounting system. In addition, the black finish provides extra protection and offers a stealthy look behind the grilles of your F8X. In addition, the CSF auxiliary radiators also feature integrated bolt on rock guards to keep the coolers safe. You've no doubt heard horror stories about OEM coolers getting punctured and spilling fluids all over the road or track. Now you can feel more confident that your cooling system is safer from road debris. Market Description: Like the other cooling systems on the F8X, the factory auxiliary radiators do a pretty good job in stock form. However, once you start adding a lot of power and pushing the car in aggressive driving conditions, the factory systems start to show its limitations. As more and more owners have pushed the limits of their S55, CSF saw the need and demand. The F8X platform is also almost a decade old with the newest examples being at least 5 years old. Over time the original coolers end up with damaged or clogged fins that greatly reduce their cooling capacity. Market Description: CSF designed the coolers to be a true "Drop-in Fit" for easy installation. Each cooler mounts in the factory location and uses the OEM quick connections. The High-Performance Auxiliary Radiators work in conjunction with the rest of the cooling system to reduce temperatures. They not only help keep temperatures in optimal ranges, but prolong the heat soak threshold. There's nothing worse than having your track session cut short because you need to do a cooldown lap. Associated Comments: The CSF #8258 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. Product Description - Extended: CSF manufactures the most advanced and efficient radiator in the industry for your F8X M3/M4/M2 Comp. CSF uses innovative tube and fin technologies with industry-leading testing methods to maximize airflow and heat dissipation. Features and Benefits: 2026 Update: New "Track-Spec" 5mm Tall Ultra Efficient Fins with a Multi-Louvered Design for Maximum Surface Area Contact and Heat Dissipation Product Description - Short: CSF BMW F8X M3/M4/M2C Auxiliary Radiators w/ Rock Guards (Sold Individually - Fits Left and Right Features and Benefits: High-Performance Upgrade Suitable for Professional Racing, Street Performance, or OEM Replacement Features and Benefits: Sold Individually - all applications require 2 auxiliary radiators Features and Benefits: 2-Row 42mm High-Performance Core Featuring CSF's B-Tube Technology Features and Benefits: Tank Volume increased by 10% and Core Size Increased by 6.4% Product Description - Long: BMW F8X M3/M4/M2 Comp High-Performance Auxiliary Radiator Features and Benefits: True "Drop-in Fit" Requires No Modifications to Install Features and Benefits: 100% All-Aluminum TIG-Welded Construction Features and Benefits: Multi-Fit - Fits Both Left & Right Side Features and Benefits: OEM Style "Quick Connect" Inlet/Outlet Features and Benefits: Individually Leak and Pressure Tested Features and Benefits: Satin Black Finish for OEM+ Look Product Description - Invoice: CSF 8258 - BMW F8X Aux Radiator Features and Benefits: Includes Detachable Rock Guard Features and Benefits: 2 Year Limited Warranty Product Description - Short: CSF Aux Radiator AAIA Part Type Description: Radiator