CSF High-Performance All-Aluminum Radiator Black Nissan Skyline GT-R R34 1999-2002 | 7231B

Keep your 1999–2002 Nissan Skyline R34 GT-R running cooler with the CSF 7231 High-Performance All-Aluminum Radiator. Designed for both street and track use, this upgraded radiator features a 2-row, 42mm ultra-high-performance core with CSF's B-Tube technology to provide increased cooling capacity and improved heat rejection compared to the factory radiator.

The radiator uses a 100% TIG-welded aluminum construction, CNC-machined mounting points, OEM-style inlet and outlet connections, and a true drop-in design that requires no cutting or modifications. The silver satin finish gives the radiator a clean, high-performance appearance while maintaining the durability needed for demanding applications.

Product Features

• High-performance all-aluminum radiator
• Satin Black Finish
• 2-row, 42mm ultra-high-performance core
• 75 cooling tubes
• CSF B-Tube technology
• Multi-louvered cooling fins
• 100% TIG-welded aluminum construction
• CNC-machined mounting points
• OEM-style inlet and outlet connections
• 1/8-NPT temperature sensor port
• M16 x 1.5 temperature sensor port with pre-installed plug
• 1.4-bar high-pressure radiator cap included
• Individually leak and pressure tested
• OEM-location fan shroud mounting points
• True drop-in installation
• 2-year limited warranty

Cooling Technology

CSF's B-Tube design uses specially engineered aluminum tubes that increase heat-transfer surface area by approximately 15% compared with conventional oval radiator tubes. The design provides increased coolant contact area while maintaining a lightweight and durable radiator structure.

The 42mm two-row core also provides significantly greater cooling capacity than the factory 15mm single-row core. The CSF radiator features 75 cooling tubes and 76 fin rows, compared with 71 tubes and 72 fin rows in the OEM radiator.

Performance Benefits

• Increased coolant capacity
• Improved heat rejection
• Helps control coolant temperatures on high-power engines
• Better suited for demanding track and motorsport use
• Stronger construction than the factory plastic-tank radiator
• Supports high-horsepower Skyline builds
• Direct replacement for the factory radiator
• Maintains OEM-style hose connections

Important Fitment Note

The CSF 7231 is based on the early R34 GT-R slim-tank radiator design and fits both early- and late-model R34 GT-Rs. However, late-model GT-Rs require different fan-shroud mounting hardware.

For late-model R34 GT-R installations, the following Nissan hardware is required:

• 4 × Nut-Spring: 21489-AA400
• 4 × Screw: 01456-00451

This hardware allows the fan to mount to the sides of the radiator rather than the top and bottom tanks.