GReddy Circuit Spec 13-Row Oil Cooler Kit with Filter Relocation – Nissan Skyline GT-R BNR34

The GReddy Circuit Spec 13-Row Oil Cooler Kit with Filter Relocation for the Nissan Skyline GT-R BNR34 is a complete, track-grade oil cooling solution engineered by GReddy — one of the most respected Japanese performance brands in the GT-R tuning world — to address the elevated oil temperatures that occur during sustained circuit driving, high-power builds, and hot ambient conditions in the RB26DETT-powered BNR34. Built around a 13-row oil cooler core for substantial heat rejection capacity, and paired with a filter relocation kit that repositions the oil filter to a more accessible location and integrates the oil cooler into the engine's oil circuit, this is a complete, purpose-engineered oil thermal management solution for the BNR34 GT-R — not an adapted universal kit. For BNR34 owners who track their car, run elevated boost, or simply want the peace of mind of a properly engineered oil cooling system from a brand with decades of GT-R development experience, the GReddy Circuit Spec kit is the definitive choice.

Key Features:

• 13-row oil cooler core — high-capacity 13-row cooler core for substantial heat rejection — engineered for the sustained high-load oil temperature demands of circuit driving and high-power BNR34 builds
• Filter relocation kit — repositions the oil filter to a more accessible location and integrates the oil cooler into the engine's oil circuit via the filter relocation sandwich plate — a clean, professional installation without tapping into the engine block
• Circuit Spec designation — GReddy's Circuit Spec products are engineered and validated for circuit racing use — the highest performance tier in GReddy's product lineup
• BNR34-specific engineering — designed specifically for the Nissan Skyline GT-R BNR34 and its RB26DETT engine's oil system architecture — correct flow rates, correct pressure drop, and correct fitment for the BNR34's engine bay
• Complete kit — includes oil cooler core, filter relocation hardware, oil lines, fittings, and all required installation hardware for a complete installation
• GReddy quality — manufactured by GReddy, a Japanese performance brand with decades of GT-R development experience and a product lineup trusted by professional and amateur GT-R racers worldwide

Performance & Thermal Management Benefits:

• 13-Row Heat Rejection Capacity: The BNR34's RB26DETT is a high-output twin-turbocharged inline-six that generates significant heat under sustained high-performance use — particularly at elevated boost levels and during back-to-back circuit sessions. The factory oil system is engineered for street use, but sustained circuit driving — especially in hot ambient conditions — can push oil temperatures into ranges where oil film strength and viscosity are compromised. GReddy's 13-row cooler core provides substantial additional heat rejection capacity that keeps oil temperatures within the optimal operating range during extended circuit use
• Oil Film and Bearing Protection: Reduced sustained oil temperatures directly translate to improved oil film strength at the RB26DETT's main and rod bearings, camshaft bearings, and turbocharger bearings — the critical wear surfaces that determine long-term engine reliability in a high-output twin-turbo application. For BNR34 owners running elevated boost or competing in circuit events, oil temperature management is a fundamental engine protection requirement
• Filter Relocation Convenience: The filter relocation kit repositions the oil filter to a more accessible location — simplifying oil changes and filter inspection on a platform where the factory filter location can be difficult to access, particularly with aftermarket intercooler piping and other engine bay modifications common on modified BNR34s
• Clean, Professional Integration: The filter relocation sandwich plate integrates the oil cooler into the engine's oil circuit without tapping into the engine block — providing a clean, reversible installation that maintains the engine's oil system integrity and does not require permanent modification
• Circuit Spec Validation: GReddy's Circuit Spec designation confirms that this kit is engineered and validated for the demands of circuit racing use — the most demanding thermal environment a GT-R's oil system will encounter. For BNR34 owners who compete or participate in track days, Circuit Spec validation provides confidence in the kit's engineering integrity under sustained high-load conditions

Specifications:

• Brand: GReddy
• Part Number: GRE12024432
• Cooler Core: 13-row
• Designation: Circuit Spec
• Includes: Oil cooler core, filter relocation kit, oil lines, fittings, and installation hardware
• Weight: 20.2 lbs (complete kit)
• Application: Nissan Skyline GT-R BNR34 (RB26DETT)

Fitment Information:

• Nissan Skyline GT-R BNR34 — 1999–2002 — RB26DETT twin-turbocharged inline-six
• Note: Verify fitment compatibility with any existing engine bay modifications before ordering — particularly aftermarket intercooler piping, front-mount intercooler kits, and other components that may affect oil cooler mounting location and line routing. Professional installation by an experienced RB26 / GT-R specialist strongly recommended.

What's Included:

• GReddy Circuit Spec 13-row oil cooler core
• Filter relocation sandwich plate and hardware
• Oil cooler lines and fittings
• All required mounting hardware and brackets
• Note: Verify complete kit contents with the GReddy documentation included with the kit.

Installation Notes:

• Professional installation by an experienced RB26 / GT-R specialist strongly recommended — oil system work on the RB26DETT requires correct procedure to avoid air locks, oil leaks, and incorrect oil pressure
• Drain and replace engine oil before and after installation — use a quality full synthetic oil rated for the RB26DETT's operating requirements
• Pressure-test the oil system after installation before starting the engine — verify all connections are leak-free
• Monitor oil pressure and temperature on the first drive after installation — verify correct oil pressure at idle and at operating temperature before returning to normal driving
• Re-inspect all oil cooler line connections after the first heat cycle and re-torque as needed
• Verify oil cooler mounting location and line routing compatibility with existing engine bay modifications before beginning installation

Why an Oil Cooler for the BNR34 GT-R?

The Nissan Skyline GT-R BNR34's RB26DETT is one of the most celebrated performance engines in Japanese automotive history — but it is also an engine that demands respect in terms of thermal management, particularly at elevated power levels and during sustained circuit use. The factory oil system is engineered for street driving, but the RB26DETT's twin-turbo architecture, high-revving nature, and the elevated boost levels common in modified BNR34 builds generate oil temperatures that can exceed the factory system's heat rejection capacity during sustained circuit sessions. An oil cooler is not an optional upgrade for a BNR34 that sees regular track use — it is a fundamental engine protection component that directly impacts the long-term reliability of one of the most valuable and irreplaceable engines in the Japanese performance car world. The GReddy Circuit Spec kit is the correct solution: purpose-engineered for the BNR34, validated for circuit use, and backed by decades of GT-R development experience.

Why GReddy?

GReddy (Trust) is one of Japan's most respected performance brands — with a product lineup spanning turbocharger systems, exhaust systems, intercoolers, oil coolers, and the full range of performance components for Japanese performance platforms, and a particularly deep history of development work on the Nissan Skyline GT-R platform across the R32, R33, and R34 generations. GReddy's Circuit Spec products represent the highest performance tier in their lineup — engineered and validated for the demands of circuit racing use by a brand that has been developing GT-R performance components since the R32 era. For BNR34 owners who want an oil cooler kit backed by genuine GT-R engineering expertise and circuit racing validation, GReddy is the benchmark choice.

Perfect For:

• Nissan Skyline GT-R BNR34 owners who track their car regularly and want circuit-validated oil temperature protection for sustained high-performance driving
• High-power BNR34 builds running elevated boost levels where oil temperature management is a critical engine protection requirement
• BNR34 owners building a comprehensive circuit package where thermal management — oil cooling, intercooling, and cooling system upgrades — is a priority
• Owners who want a GReddy Circuit Spec kit with correct BNR34-specific fitment and the filter relocation convenience that simplifies oil changes on a modified GT-R

Pro Tip: Pair the GReddy oil cooler with an oil temperature and pressure gauge or data logging system to monitor the cooler's effectiveness across different circuit conditions and ambient temperatures. Baseline oil temperature data before installation and compare post-installation to quantify the cooler's thermal management benefit for your specific BNR34 build and driving environment.

Note: Professional installation strongly recommended — oil system work on the RB26DETT requires correct procedure. Verify fitment compatibility with existing engine bay modifications before ordering. Pressure-test the oil system after installation before starting the engine.