The CSF Racing Universal Motorsport Dual Pass Radiator (SKU: CSF8374) redefines cooling solutions for drift cars and high-performance vehicles. Recognising that drifting has evolved into a dominant motorsport, CSF's engineering team collaborated with industry experts to design this state-of-the-art radiator.

This radiator is exceptionally versatile and suitable for various racing applications. Its size is perfect for rear-mounted setups, and an optional shroud with fans ensures optimal cooling during intense sideways action. As the largest drift radiator available, it meets the high demands of competitive racing.

CSF has a rich history in motorsports, supporting teams in events such as Time Attack, GTC, and Formula Drift. The introduction of this large radiator fills a crucial gap in the CSF lineup, catering particularly to the needs of drifting enthusiasts.

Design & Engineering

CSF has been heavily involved in motorsports for years supporting teams and enthusiasts in Time Attack, GTC, SRO, Drifting, along with Drag and Roll Racing. Many of CSF’s “Drop-In” fit cooling systems are used in competition in addition to the Universal Systems. One thing that has been missing from the CSF catalog though was a large motorsport radiator; until now.

Key Features:

Largest Motorsport Radiator on the market
Overall Dimensions Including Shroud & Fans (WxHxD): 794.10 x 470.00 x 172.56 mm (31.264 x 18.661 x 6.749 inches)
Overall Dimensions Radiator Only (WxHxD): 794.10 x 470.00 x 90.00 mm (31.264 x 18.661 x 3.543 inches)
100% TIG Welded Construction
Massive 705mm x 448mm x 68mm Core
CSF’s Exclusive B-Tube Technology and 8mm super-efficient multi-louvered fins
Dual Pass Core for maximum efficiency
20AN ORB Inlet/Outlet fittings for maximum flow
12AN ORB ports for sensor mounting and bleeding
8 (4 per tank) M8 x 1.25 Bosses Mounting Bosses
Available as a full Cooling Module that includes a Shroud, 14” SPAL Brushless Fans, and Jumper Harnesses (CSF #8374)

Radiator Core

The new Motorsport Dual-Pass Radiator is the largest and most efficient cooler CSF has produced. It features a mammoth 705mm x 448mm (27×75” x 17.5”) core that is 68mm thick. The 68mm core is 24% thicker than the nearest competitor which uses a 55mm core. This means more heat transfer and thermal capacity than any other radiator on the market.

CSF’s Exclusive B-Tube Technology increases the heat transfer by approximately 15% over regular oval welded tubes. The 44 rows of 8mm super-efficient multi-louvered fins maximize airflow through the core for the best possible performance.

Dual Pass Design

A dual pass configuration was chosen for a number of reasons. The design has several benefits but mainly boils down to cooling performance and ideal configuration.
Performance

From the performance perspective; a dual pass core offers a great balance between optimal cooling and back pressure. By extending the coolant flow path, coolant stays in the radiator longer allowing for additional heat dissipation. While a triple pass may offer even more benefits in this regard, it also creates more resistance and in turn pressure drop. Depending on your setup, this might not be an ideal design. The dual pass design offers a nice balance between ultimate cooling performance and coolant pressure regulation.

Configuration

The other benefit of the dual pass design is it places both fittings on one side of the radiator. This configuration is much easier for setting up a remote or rear mounted radiator. Builders can run the inlet and outline lines together for simpler fabrication and overall shorter coolant lines. The fans can also be clocked in 4 different positions to make wire routing easier.

Fittings & Mounting

The radiator features threaded -20AN ORB ports for the main coolant inlet and outlet for maximum flow capabilities. One piece of feedback CSF has gotten over the years with the R-1 Triple-Pass “Ultimate Motorsports” Competition Radiator (CSF #8023) has been wanting something with -20AN capabilities instead of only -16AN.

To offer customers more versatility, CSF went with -20AN ORB ports that can be used with either -20AN or -16AN Fittings. Larger -20AN fittings and lines offer both a higher burst pressure limit and greater flow rate.

The inlet/outlet tank also features two pre-plugged 12AN (1-1/16″-12) ORB ports. These two ports can be used to mount sensors, aid in bleeding the coolant system, connecting an expansion tank, and more. Each port/bung is located above/below the inlet and outlet fittings.

Mounting Bosses

CSF designed the Motorsport Radiator to give fabricators and builders a wide variety of mounting options. Because this radiator will be mounted in different positions and orientations depending on the application, the engineers wanted to make sure there were mounting bosses for any type of setup.

Each tank is equipped with four M8x1.25 mounting bosses. One on the top and bottom of each tank, and two on the sides. This allows for bolt-on mounting for any type of structural frame or cradle no matter how or where the radiator will be mounted.

Shroud + 14” SPAL Brushless Fans & Harnesses

SPAL Brushless Fans (CSF #8374). The shroud is made of TIG welded laser cut aluminum that bolts to either side of the radiator. The fans are 14 inch (355mm) SPAL ABL505P 12V Brushless Puller Fans (SPAL 30107102). Each fan is capable of moving 2395 CFM (4060 m3/h) of air for a combined total of 4790 CFM (8120 m3/h).

The shroud and fan module was designed with drifting in particular in mind. Due to the lack of airflow from racing sideways, there is a huge burden on the cooling system. These fans combined with a precision made shroud offer ample airflow for the radiator in the most adverse conditions and situations. This module is also well suited for high power rock crawlers that see minimal airflow as well as trophy trucks that deal with a lot of clogging from sand.

Wiring Harness Included (when radiator + shroud kit purchased)

Most aftermarket fan kits don’t include the jumper harnesses (pig tails) and rely on the customer to source their own or rewire in the factory connectors. While this works when replacing factory cooling fans, custom race setups can’t always rely on this method. Especially when the radiator will not be mounted in the factory location. CSF includes the jumper harnesses (SPAL SBL-YAZ-PT10) with the #8374 to make the wiring process as easy as possible.

These harnesses include the plug and play connectors that match the SPAL Fan (PN: 30107102) connectors. The large gauge wiring allows for sufficient power to be run to the fans and simplifies the fabrication and setup process. This kind of detail is often overlooked by manufacturers but CSF went the extra mile to make the installation process as easy as possible.

Custom Shroud Provisions

CSF understands that many customers would prefer to design and fabricate their own shroud in some cases. The Radiator only (CSF #8378) includes fasteners (8 U-Nuts and Bolts) for your convenience. This is a great option for those wanting a low profile design, different spec fans, or have specific space constraints.

Testing and Race Use

Drift HQ

CSF worked closely with Drift HQ in development and testing. Their expertise and experience with building drift cars offered valuable insight and feedback. The team there played a huge role in many of the exclusive features you won’t see on any competitor’s radiators.

Formula Drift

CSF has been a long time sponsor of several Formula Drift drivers and champions. Three drivers will be running the new Motorsport Dual-Pass Radiator for the 2026 season.

Fredric Aasbø & Papadakis Racing

CSF has been working with renowned race car builder Papadakis Racing (Stephan Papadakis) for many years. Fredric Aasbø’s A90 Supra is completely cooled by CSF and has been running the R-1 Triple-Pass Competition Radiator (CSF #8023) for several years. While it has performed very well for him over the years, upgrading to the new Motorsport Dual-Pass Radiator will offer more cooling headroom for additional power and peace of mind in competition.

Matt Shulman & Enjuku Racing

Matt Shulman is entering his first season in the ProSpec division of Formula Drift. Stepping into the big leagues also meant big changes to his S13, and one of those changes is the cooling system. He will be running the new Motorsport Dual-Pass Radiator in a rear mounted configuration along with a custom intercooler featuring the CSF #8173 Core.

Collin Zielinski

Collin Zielinski is heading into his second season of ProSpec Formula Drift finishing 7th overall in his rookie season in 2025. His LS powered S14 is an absolute monster but he learned last year the limits of his old cooling system. When he saw the Motorsport Dual-Pass Radiator at SEMA last year, he immediately knew what he wanted and needed.

Radiator Fan Shrouds