Nissan RB20DET RB25DET RB30 + Garrett GT28R GT30R GT35R Turbo Oil Drain Hose Kit

Oil Drain System for RB20 / RB25 / RB30 Upgrading to GT28R / GT30R / GT35R

The Garrett GT-series turbos—GT28R, GT30R, and GT35R—are among the most popular upgrades for RB20DET, RB25DET, and RB30 engines due to their strong response and high power potential.

When switching from the factory turbocharger to any GT-series unit, or converting an RB30 N/A engine to turbo, a new oil drain solution is required because flange patterns, turbo position, and hose routing differ from OEM hardware.

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

Built for the temperature, RPM, and vibration characteristics of RB engines, it provides a reliable, leak-free oil return path for GT28R, GT30R, and GT35R setups.

Key Features

‣ Application: Nissan RB20DET / RB25DET / RB30 — Skyline R32 / R33 / R34 & RB30 turbo conversions
‣ Turbo Compatibility: Garrett GT28R / GT30R / GT35R ball-bearing turbos
‣ Upgrade-Focused Design: Required when installing GT-series turbos due to different drain flange and mounting geometry
‣ Hose Construction: High-temperature NBR oil drain hose suitable for high-RPM turbo use
‣ Flange Material: 6061-T6 CNC-machined aluminum GT-series drain flange
‣ Fittings: Mild-steel oil drain fittings providing secure 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: Fits RB20/RB25 factory-turbo replacements and RB30 N/A → turbo builds
‣ Performance Benefit: Maintains consistent oil drainage during boost, high 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 GT-series drain flange
• 1 mm Interface N-8092 gasket
• Mild-steel drain fittings
• High-tensile bolts
• Hose clamps

Required Oil Drain Hardware for GT-Series RB Turbo Upgrades

Garrett GT28R / GT30R / GT35R turbos require a proper oil return path to avoid CHRA oil pooling and smoking—especially on high-RPM RB engines.
This Gryphontek kit provides the correct flange, hose, and hardware for a clean, reliable oil drain setup.

⚙️ Upgrade your RB turbo system with an oil drain kit engineered for GT-series performance.