Nissan RB20DET RB25DET RB30 + Garrett G-Series G25 G30 G35 Turbo Oil Drain Hose Kit

Oil Drain System for RB20 / RB25 / RB30 Upgrading to G25 / G30 / G35 Turbos

The Garrett G-Series—G25, G30, and G35—delivers exceptional response and efficiency, making them highly popular turbo upgrades for RB20DET, RB25DET, and RB30 engines.

When switching from the factory turbocharger to a modern G-Series unit, or converting an RB30 N/A engine to turbo, a new oil drain solution is required due to different flange patterns, turbo height, and hose routing.

This Gryphontek turbo oil drain hose kit includes a CNC-machined G-Series drain flange, heat-resistant NBR oil drain hose, mild-steel fittings, a 1 mm non-asbestos gasket, and high-tensile hardware.

Designed for RB engine vibration, sustained RPM, and operating temperature, it provides a stable and leak-free oil return path for G25, G30, and G35 turbo installations.

Key Features

‣ Application: Nissan RB20DET / RB25DET / RB30 — Skyline R32 / R33 / R34 & RB30 turbo conversions
‣ Turbo Compatibility: Garrett G25 / G30 / G35 ball-bearing turbos
‣ Upgrade-Focused Design: Required when installing G-Series turbos due to different drain flange geometry
‣ Hose Construction: High-temperature NBR oil drain hose suitable for high-RPM turbo use
‣ Flange Material: 6061-T6 CNC-machined aluminum G-Series drain flange
‣ Fittings: Mild-steel oil drain fittings engineered for stable sealing under RB vibration
‣ Gasket: Interface N-8092 1 mm non-asbestos gasket
‣ Hardware: Stainless hose clamps + class 8.8 high-tensile bolts
‣ RB Upgrade Ready: Works for RB20/RB25 turbo upgrades and RB30 N/A → turbo conversions
‣ Performance Benefit: Supports clean and consistent oil drainage under boost, extended RPM, and elevated temperature
‣ Custom Length Option: Hose length can be customized to suit different turbo placements, supporting both stock-mount and top-mount configurations

Kit Includes

• NBR turbo oil drain hose
• 6061-T6 CNC-machined G-Series drain flange
• 1 mm Interface N-8092 gasket
• Mild-steel oil drain fittings
• High-tensile bolts
• Hose clamps

A Required Oil Drain Solution for G-Series RB Turbo Upgrades

Garrett G-Series turbos use a different drain flange and require a properly sized oil return system to prevent CHRA oil pooling.
This Gryphontek kit provides the correct flange, hose, and hardware to support a clean, reliable oil return for RB turbo upgrades.

⚙️ Upgrade your RB turbo build with an oil drain system engineered specifically for G25, G30, and G35 turbos.