CSF
Radiators
All-aluminum performance radiators, intercoolers, oil coolers, and complete cooling system upgrades for street, HPDE, and race applications. Four generations of family ownership, 50+ years of cooling engineering, and proven results in some of the most demanding motorsport events in the world.
Shop CSF at Track Ready ProductsAbout CSF Radiators
CSF started as a small radiator repair shop and has grown over four generations of family ownership into one of the most technically sophisticated cooling manufacturers in the world. The OE Replacement division supplies over 35 million cooling systems annually to the automotive aftermarket. The Racing & High Performance division — which is what matters most to Track Ready Products customers — was founded specifically to serve performance enthusiasts and professional racers who need more than a stock replacement. CSF Race products are tested in salt spray, vibration, leak, impulse, burst cycle, and wind tunnel conditions before they ship, and their welders are trained annually by Isuzu at their main manufacturing facility in Japan.
The technology that sets CSF apart is their B-Tube core design — an exclusive tube geometry that increases heat transfer approximately 15% over conventional oval welded tubes — combined with multi-louvered fins that maximize airflow through the core. Their Drop-In Fit performance radiators are direct-fit replacements using all-aluminum TIG-welded construction instead of the OEM plastic end tank and crimped joint design. The lineup also includes intercooler systems for turbocharged platforms, oil coolers, charge air cooler manifolds, and the full Black Series complete cooling suite for high-demand builds on BMW M cars, Porsche 911, and other focused platforms.
The guides on this page cover how CSF's cooling technology works, how to pick the right radiator for your car and use case, intercooler selection for turbocharged applications, and platform-specific install notes for the cars TRP customers actually drive. Browse CSF cooling products by vehicle →
Brand Overview
Start Here
CSF Radiators Explained: B-Tube Technology, All-Aluminum Construction, and Why It Outperforms OEM
How CSF's B-Tube core geometry works, why TIG-welded aluminum tanks outperform crimped plastic OEM units, and what the 15% heat transfer improvement means in real track conditions.
PlannedCSF Race vs CSF OE Replacement: Understanding the Two Product Lines and Which One You Need
The difference between CSF's mass-market OE replacement line and the Racing & High Performance division, what testing the race line goes through, and how to tell which part number applies to your build.
PlannedWhy Your Car Overheats at the Track — and What a Performance Radiator Actually Fixes
How OEM cooling systems are designed for normal road use, why sustained high-RPM track driving overwhelms them, and the specific failure modes a CSF upgrade addresses before they strand you in the paddock.
PlannedPerformance Radiators
Drop-In Fit Cooling Upgrades
Single-Pass vs Dual-Pass vs Triple-Pass Radiators: What Each Design Does and When You Need More Than Single-Pass
How coolant flow path affects heat extraction, when a dual-pass design is the right upgrade, and why triple-pass is typically reserved for high-horsepower builds with sustained heat load.
PlannedHow to Pick a CSF Performance Radiator for Your Car: Core Size, Row Count, and Fitment Considerations
Row count vs core thickness tradeoffs, how CSF's 42mm core sizes compare to OEM, what "drop-in fit" actually means for installation time and clearance, and how to confirm fitment before ordering.
PlannedCSF Black Series Cooling Suites: What a Complete Cooling System Overhaul Covers on BMW M and Porsche Platforms
What the Black Series includes beyond the main radiator — auxiliary rads, charge air coolers, oil coolers, heat exchangers — and why addressing the full system matters more than a single component swap.
PlannedIntercoolers & Charge Air Cooling
Turbo & Boosted Platforms
How Intercoolers Work and Why Intake Air Temperature Matters More Than Most Drivers Realize
The relationship between IAT and power output, how heat soak degrades performance across a track session, and what a CSF intercooler upgrade specifically targets in a turbocharged application.
PlannedFront-Mount vs Top-Mount Intercoolers: Which Configuration Is Right for Your Build?
FMIC vs TMIC placement tradeoffs, response characteristics, heat soak resistance, packaging constraints by platform, and when a factory intercooler location upgrade is enough vs when relocation makes sense.
PlannedCSF Universal Intercooler Cores: How to Size and Select a Core for a Custom Boost Application
Bar-and-plate vs tube-and-fin core construction, how to size a core by airflow requirement, and how CSF's universal core catalog supports custom fabrication for builds without a catalog application.
PlannedHow-To Guides
Installation & Maintenance
How to Install a CSF Performance Radiator: Coolant Flush, Torque Specs, and Bleeding the System
Step-by-step radiator swap walkthrough, why a full coolant flush matters before installing a new radiator, how to properly bleed air from the system, and what coolant type to use.
PlannedCoolant Selection for a Performance Radiator: What to Run, What to Avoid, and Mixing Rules
OAT vs HOAT vs IAT coolant chemistry, why distilled water is always required, the case for water-only at track events, and what mixing incompatible coolants does to an all-aluminum radiator over time.
PlannedCar Still Overheating After a Radiator Upgrade: What Else to Check Before Assuming the Radiator Is the Problem
Thermostat, water pump flow rate, coolant cap pressure rating, air in the system, fan operation — the components upstream and downstream of the radiator that are more likely culprits than the core itself.
PlannedReading Coolant Temperature at the Track: What Numbers Are Normal, What's a Warning, and When to Come In
Normal operating ranges by platform, the difference between a gradual climb and a sudden spike, when to do a cool-down lap vs when to pit immediately, and how to log temperatures for diagnosis.
PlannedVehicle & Application Guides
By Platform
CSF Cooling for BMW G80/G82/G87 M3, M4, and M2: The Full S58 Cooling Suite Explained
The S58's multi-exchanger cooling architecture, what CSF's G8X cooling suite covers (main rad, aux rads, charge air cooler, oil cooler, heat exchanger), and which components to prioritize for HPDE vs street use.
PlannedCSF Radiator for BMW E46, E9X, and F8X M3/M4: Platform-Specific Fitment and What Each Generation Needs
Generation-by-generation breakdown of CSF radiator options for the M3/M4 lineage, what the S65, S55, and S58 engines demand differently from their cooling systems, and installation notes by chassis.
PlannedCSF Cooling for Porsche 911: 996, 997, 991, and 992 Radiator and Intercooler Options
How Porsche 911 cooling architecture changed across generations, which CSF products are available for each chassis, and specific considerations for Porsche Cup and HPDE drivers running 992 Carreras at the track.
PlannedCSF Radiator for Toyota GR86 and Subaru BRZ: Why the Factory Cooling System Falls Short at Track Days
How the FA24 engine's cooling demands compare to OEM radiator capacity, what CSF's all-aluminum replacement adds for lap-day use, and whether the upgrade is necessary for street-only drivers.
PlannedCSF Heavy Duty Radiator for Ford F-150 and Raptor: What the Upgrade Adds for Towing, Off-Road, and Modified Trucks
How the CSF 42mm core and B-Tube technology improves on the factory F-150 radiator, which modifications increase cooling demand enough to warrant an upgrade, and plug-and-play installation notes for the 14th gen.
PlannedCSF Radiator for Toyota 4Runner and Tacoma: Overland, Off-Road, and Tow Rig Cooling Upgrades
Why sustained low-speed off-road driving and towing create different cooling demands than highway use, which CSF radiator options are available for 5th gen 4Runner and 3rd gen Tacoma, and what to expect after install.
Planned