Holden Commodore VL RB30ET + Garrett G-Series G25 G30 G35 Turbo Oil Drain Hose Kit

Oil Drain System for RB30ET Upgrading to G-Series G25 / G30 / G35 Turbos

Upgrading the Holden VL RB30ET to a modern Garrett G-Series G25, G30, or G35 turbo delivers sharper response, improved compressor efficiency, and higher power capacity.

Because the G-Series uses a different drain flange pattern compared to the original RB30ET turbo, a new oil drain solution is required to maintain proper oil evacuation and prevent CHRA pooling or smoking.

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

Engineered for both stock-mount and top-mount G-Series installations, it provides a stable, leak-free oil return path under high temperature and sustained boost.

Key Features

‣ Application: Holden Commodore VL RB30ET turbo engines
‣ Turbo Compatibility: Garrett G25 / G30 / G35 ball-bearing turbos
‣ Upgrade Requirement: Necessary when switching from the OEM turbo to G-Series unit due to different drain geometry
‣ Hose Construction: High-temperature NBR oil drain hose for continuous thermal load
‣ Flange Material: 6061-T6 CNC-machined aluminum G-Series drain flange
‣ Fittings: Mild-steel oil drain fittings providing reliable sealing under RB30ET vibration
‣ Gasket: Interface N-8092 1 mm non-asbestos gasket
‣ Hardware: Stainless clamps + class 8.8 bolts
‣ Mounting Flexibility: Works for stock-mount and top-mount G-Series turbo positions
‣ Performance Benefit: Ensures smooth oil evacuation during extended RPM, high boost, and increased CHRA temperature
‣ Custom Length Option: Hose length can be customized for different manifold layouts and turbo heights

Kit Includes

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

The Required Oil Drain Solution for G-Series RB30ET Turbo Upgrades

Garrett G-Series turbos require the correct drain flange and hose routing to ensure stable CHRA oil evacuation.
This Gryphontek kit delivers the proper flange, gasket, and drain hose needed for a clean and reliable return path.

⚙️ Equip your RB30ET with an oil drain system engineered specifically for G25, G30, and G35 turbo upgrades.