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Radium Engineering  |  SKU: rad20-0607
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Radium Engineering 2015+ Subaru STi Air Oil Separator-Return Kit

$ 427.45 $ 449.95
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Short Description

The Radium Engineering 2015+ Subaru STI Air Oil Separator-Return Kit separates oil mist and blow-by contaminants from crankcase vapors while returning collected oil to the engine through the designed crankcase return path. The application-specific kit helps reduce oil carryover into the intake while providing a clean, vehicle-specific installation.

Pickup available at SHOP HQ

Usually ready in 5+ days

Delivery and Shipping

Domestic orders for in-stock items typically arrive within 5-10 business days, while international orders for in-stock items may take 12–15 business days.

If an item is out of stock or back-ordered, we will contact you within 3–5 business days with an estimated time of arrival (ETA) or alternative options before the order is fulfilled.

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Description

The Radium Engineering 2015+ Subaru STi Air Oil Separator-Return Kit separates oil mist and blow-by contaminants from crankcase vapors while allowing collected oil to return to the engine where the system is designed to do so. It is a clean way to reduce oil carryover through the intake on a modified or hard-driven engine without relying on a collection of universal hoses and brackets.

This version is designed around Subaru STi, so the mounting, routing, or connection details should be checked against that application before installation. Confirm vehicle fitment, crankcase return routing, and any left-hand/right-hand-drive restrictions before installation.

Specifications

Vehicle Fitment: 2015+ Subaru STI

Brand: Radium Engineering

Part Number: 20-0607

Type: Air Oil Separator Return Kit

Function: Crankcase Vapor Separation & Oil Return

Design: Vehicle-Specific Air Oil Separator and Return System

Application: 2015+ Subaru STI Performance Engines

Use: Oil Vapor Management & Crankcase Ventilation

Installation: Subaru STI Engine Bay / Crankcase Ventilation System

Oil Separation: Separates Oil Mist and Blow-By Contaminants From Crankcase Vapors

Oil Return: Returns Collected Oil to the Engine Through the Designed Return Path

Crankcase Ventilation: Application-Specific Crankcase Vapor Routing

Intake Protection: Helps Reduce Oil Carryover Into the Intake System

Plumbing: Vehicle-Specific Crankcase Ventilation and Oil Return Plumbing

Mounting: Application-Specific Subaru STI Installation

Compatibility: 2015+ Subaru STI

Fitment: Confirm Exact STI Model, Engine Configuration, Crankcase Port Locations, Hose Routing and Available Clearance Before Installation

Return Routing: Verify Proper Oil Return Path and Connection to the Engine

Drive Configuration: Confirm Compatibility With Left-Hand-Drive or Right-Hand-Drive Vehicle Configuration Where Applicable

Application Requirements: Match the kit to the exact STI crankcase ventilation layout and verify all return and vapor-routing connections before installation

Application Note: Confirm vehicle fitment, crankcase return routing and any left-hand-drive/right-hand-drive restrictions before installation. Proper hose routing and oil return orientation are important for correct air-oil separator operation.

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