Throughout the last decade, the CSF High-Performance brand has made its name in the motorsports world, but many will be shocked to find out that CSF’s roots actually come from the heavy-duty and off-road world of copper/brass radiators. Since the ‘70s CSF has sold tens of thousands of H.D. Toyota radiators dating back to 3rd gen Landcruisers and FJ40s. We’re bringing it back full circle in 2020, with a renewed focus on our off-road line of heavy-duty performance radiators, especially for Toyota Trucks and SUVs.

CSF is proud to announce the latest release to its growing late-model Toyota off-road series: CSF’s new (and industry-exclusive) 5th gen Toyota 4Runner high performance and heavy-duty all-aluminum radiator (CSF #7085).

There has been substantial growth in the Toyota off-road market, and enthusiasts are hitting the trails more than ever! Compared to some of the other SUVs on the market, the 5th Gen 4Runner is one of the major players in the US for those wanting a durable, truck-based SUV that’s as comfortable on the road as it is on the trail. As time has gone by, the demand for aftermarket performance parts has continued to grow. Enthusiasts continue to push the limits of their 4Runners – from driving in the desert sand dunes, navigating up mountain trails, to towing and hauling gear for overlanding and even partaking in extreme rock crawling and hill climbing. 

Heat Soak Issues = Solved

One common issue found in such off-road activities is heat soak. Most off-road trails, especially rock crawling and hill climbing, are usually traversed at very low speeds with high engine power output. This can lead to engine and transmission overheating and leave drivers stranded, even in the desert or on a trail in the middle of nowhere with no rescue nearby. 

Increased Performance

CSF’s new 5th gen 4Runner high-performance radiator fixes potential heat soak and overheating issues by increasing the capacity of the radiator and increasing the efficiency of the radiator core.

Utilizing CSF’s exclusive B-Tube Technology and increasing the core size from a tiny 1-row 22mm core to an ultra-efficient 2 row 42mm core, CSF has taken care of any worries of overheating. With the increased size of the radiator, CSF has also increased the capacity of the transmission oil cooler found in the bottom tank – this will help keep transmission temperatures in check, especially when towing.

CSF’s 5th Gen Toyota 4Runner all-aluminum 42mm 2 row high-performance radiator core vs. the OEM 1 row 22mm core

Maximum Durability

CSF has answered the call for increased performance and durability with its new 5th gen Toyota 4Runner All Aluminum Heavy-Duty Radiator. It’s the perfect answer to upgrading and safe-guarding against the weak OEM radiator with plastic end tanks.

OEM plastic/aluminum radiators make sense to produce in mass quantities to get cars and trucks through the assembly line and onto the road, but they come with many limitations – especially when drivers take their SUVs and trucks off-road or drive them in extreme conditions. After several years, the plastic tanks can start to become brittle from excessive heat cycles, can crack under heavy vibration, or can burst from extreme pressures and temperatures (including cold starts in freezing temperatures). 

CSF’s 100% TIG welded all-aluminum end tanks prevent potential leakage when compared to the weaker plastic tanks that utilize a rubber gasket and a crimp design to seal.

For additional strength and reliability, all of CSF’s all-aluminum radiators have CNC machined mounting brackets and pins – a vast improvement over the OEM plastic mounting points, which can crack under high vibration or stress – common occurrences when off-roading or towing. Considering the retail price of an OEM Toyota 5th gen 4Runner radiator, for less than $100 USD more, one can upgrade to the CSF All Aluminum Heavy-Duty Radiator. A very small premium to protect against failures while also increasing your 4Runner’s performance.

CSF has recently partnered up with RPM Off-Road Garage for test fitment into one of their shop’s 5th gen 4Runners. Thanks to Al (@sponsoredbywifey) for testing the radiator in real-world conditions through daily driving, long road trips, and many off-road excursions.

“The radiator held up to many tests without any problems. With that confidence, I feel good about installing them on our customers’ vehicles as I back every CSF part I sell and install to the fullest.”

Steve Lam, RPM Off-Road Garage

With removal of the front bumper, CSF’s All Aluminum Heavy-Duty Radiator drops right in with no modifications necessary. Even with the thicker core, there’s still enough space to clear the fan and shroud. 

High-Performance Radiator (#7085) Features:

  • 2 Row, 42mm Ultra High-Performance Core Featuring CSF’s Exclusive B-Tube Technology
  • Core Features Ultra-Efficient, 6.5mm Tall Fins with a Multi-Louvered Design for Maximum Surface Area Contact
  • Upgraded 4-Plate Automatic Transmission Cooler Built Into Bottom End Tank
  • Individually Leak and Pressure Tested
  • CNC Machined Mounting Brackets for Superb Fit and Durability
  • 100% All Aluminum TIG-Welded Construction
  • True “Drop-In-Fit” Requires No Modifications to Install
  • 1 Hour “Mirror Finish” Hand Polish
  • 2 Year Limited Warranty

Part Number: CSF7085
OEM Numbers: 16400-31710, 16400-31711, 16400-31712, 16431713 & 16410-AZ030
Pricing: MSRP – $529.00 USD
Fitment: 2010-2022 (5th gen) Toyota 4Runner (4.0L & 2.7L)


Add a Comment

Your email address will not be published. Required fields are marked *



    From what I can find regarding the OEM part numbers our #7085 Radiator should fit the 2011 Toyota Prado 4.0L V6 Petrol. The OEM part number interchange for our radiator is 16400-31710 which shows as fitting the Prado. I would double check with a local dealership to make sure that is the correct part number for your vehicle. If that OEM part number matches it will fit.

    Thank you for clearing that out yes that my radiator so i was searching for prado and i came across 4runner csf so i bought it and i was waiting for it to be delivered

    Am desert driver so i face heat in summer time with my oem when push hard in bigger dune in dubai that and my overheat easily in afternoon time

    So am happy to know it can be fixed cant wait to try it thank again

    You can install the radiator from the top with just the hood open. Very easy install and nothing major needs to come apart.

    Hey, putting together a list of parts together in supercharger the 2017 4Runner with Magnuson. I got some couple questions:

    1) Would you recommend pairing your CSF Universal Oil Coolers (CSF #8201, #8202, #8066, #8110, #8111, #8119) with the CSF Radiator?
    2) If so, which size oil cooler would be recommended? Im looking at the 13″?

    Thank you for your time!

    Hi Darren,

    Apologies for the late reply. We plan to add the same supercharger for the CSF TRD 4Runner in the future.

    In our experience, whenever you add forced induction to a normally NA vehicle an oil cooler is a good idea. Generally you don’t need to go overkill so something like the #8119 would probably be sufficient and easy to fit in a lot of locations. You could always go larger and it would hurt to have a little more volume, you’ll just have to make sure you install a thermostatic valve (typically done in a sandwich plate but there are other options out there).

    This radiator looks great. Does it fit alongside other upgrades? I have a large after market bumper (C4 overland series) and WARN winch. Is this radiator compatible with these? Also, do I need to remove the bumper in order to install the radiator?


    Hi Mike,

    You should have no issues fitting this alongside other upgrades. This fits in the OEM location so as long as you are still using the factory radiator there will be no fitment issues with other parts. You do not need to remove the bumper to install. You can remove the original radiator from the top and drop in the CSF radiator the same way.

    Will this be necessary for a magnuson supercharger on my 2015 4runner for durability and I’m also installing at afe air intake. Is this necessary to have or should I focus on other mods that will hold the longevity of the 4runner with the supercharger

    This is a great modification if you are supercharged. A Supercharger generates more heat + you have now stacked an additional heat exchanger in front of the radiator – Getting a better radiator will help your car operate at optimal temperatures, even in demanding driving conditions.

    We just installed a radiator on a Supercharged Tundra with great success. There is a great video here!