CSF 7230B All-Aluminum Radiator Nissan R33 Skyline GT-R GTS 1994-1998 RB26

Vehicle Fitment

• 1995-1998 Nissan Skyline R33 GT-R (RB26DETT - incl. Nismo, V-Spec, CRS variants)
• 1994-1997 Nissan Skyline R33 GTS (RB20DE / RB20DET)
• 1994-1997 Nissan Skyline R33 GTS-25 / GTS-25t (RB25DE / RB25DET)
• 1994-1997 Nissan Skyline R33 GTS-4 (RB25DET, AWD)

Fitment Notes

• Mounts in the factory radiator location with no modifications or cutting required - uses all OEM mounting points and hardware
• Replaces Nissan OEM part number 21410-15U17 (supersedes 21410-15U10)
• CSF 7230B is the black powdercoat finish version - the brushed aluminum finish version is CSF 7230
• For the R32 Skyline (1989-1994) equivalent, see CSF 7229/7229B; for the R34 Skyline (1999-2002), see CSF 7231/7231B
• For the full billet CNC-machined end tank version for the R33, see CSF 7219/7219B (TopRank collaboration)
• Manual transmission applications; confirm compatibility for automatic before ordering

Features

• 2-Row 42mm all-aluminum core - significantly increases coolant fluid capacity and heat dissipation surface area over the factory radiator, providing meaningful thermal headroom for modified RB20, RB25, and RB26 builds
• CSF's exclusive B-Tube technology - seam-brazed B-shaped tube cross-section increases heat transfer surface area by approximately 15% over conventional oval welded tubes, delivering dual liquid laminar flow within the same core footprint
• Ultra-efficient multi-louvered fins maximize airflow through the core for sustained cooling performance under track, street, and high-boost conditions
• High-grade aluminum end tanks, TIG-welded to the core - strong, durable construction that withstands the thermal cycling and pressure demands of turbocharged RB-engine builds
• Pre-plugged 1/8" NPT port on the top end tank for optional coolant temperature sensor installation
• M16x1.5P port on the bottom end tank for optional coolant temperature sensor installation
• Black powdercoat finish - thermal-rejection coating and a stealthy, aggressive look well-suited to modified and track-oriented R33 builds
• Drop-in fit: mounts to all factory brackets and accepts factory radiator hoses - no modification required

Specifications

• Part Number: CSF 7230B
• Part Type: High-Performance All-Aluminum Radiator (CSF 7000-Series)
• Construction: 2-Row, 42mm core, B-Tube, TIG-Welded, All-Aluminum
• Finish: Black Powdercoat (thermal-rejection)
• Sensor Ports: 1/8" NPT (top tank, pre-plugged); M16x1.5P (bottom tank)
• OEM Cross Reference: Nissan 21410-15U17 (supersedes 21410-15U10)
• Application: 1994-1998 Nissan R33 Skyline GT-R / GTS (RB20 / RB25 / RB26)

Included Components

• 1x CSF 7230B High-Performance All-Aluminum Radiator (black powdercoat finish)

Product Description

The CSF 7230B is the black powdercoat variant of CSF's high-performance all-aluminum radiator for the 1994-1998 Nissan R33 Skyline, covering GT-R variants (RB26DETT, including Nismo, V-Spec, and CRS) and GTS variants (RB20DE/DET, RB25DE/DET, and AWD GTS-4). As part of CSF's 7000-series Racing & High Performance Division, the 7230B uses a 2-row 42mm core with CSF's proprietary B-Tube technology - a seam-brazed B-shaped tube cross-section that increases heat transfer surface area by approximately 15% over standard oval-welded tubes and creates dual liquid laminar flow within the same package dimensions. The result is substantially higher cooling capacity than the factory unit, with enough thermal headroom to support the heat output of modified and high-boost RB-series builds.

The black thermal-rejection powdercoat finish gives the 7230B a clean, aggressive appearance suited to engine bay builds where aesthetics matter alongside performance. The radiator mounts directly in the factory location using all OEM hardware and mounting points with no modifications required, and includes pre-plugged 1/8" NPT and M16x1.5P sensor ports for optional coolant temperature monitoring. It replaces Nissan OEM part number 21410-15U17. The brushed aluminum version is CSF 7230. R32 Skyline owners should reference CSF 7229/7229B; R34 owners should reference CSF 7231/7231B.