Radium Engineering Air/Oil Separator Kit

Fitment: 2015-2021 Subaru WRX / 2014-2018 FXT

Part #: 20-0258-00

Overview

The Radium Engineering Air/Oil Separator (AOS) Kit is a high-performance solution designed specifically for turbocharged Subaru engines that produce excessive blow-by gases and oil vapor. This kit is ideal for enthusiasts and tuners seeking to maintain engine cleanliness and optimize performance during all driving conditions. By effectively capturing blow-by oil and pollutants before they reach critical engine components, the AOS helps improve intake air quality, reduce carbon buildup, and support long-term engine reliability. Its robust construction and precise design make it suitable for modified engines that demand more from their crankcase ventilation system. Whether you are building a high-powered Subaru or upgrading your existing setup, this separator kit provides a reliable and maintenance-friendly way to manage crankcase gases. It helps keep your intake system cleaner, supports consistent turbocharger performance, and minimizes the risk of oil-related issues that can impair engine efficiency. Designed with durability and ease of installation in mind, the Radium AOS is a valuable upgrade for serious Subaru enthusiasts.

Key Features

This Air/Oil Separator Kit features a thoughtfully engineered design aimed at maximizing efficiency and durability. Key features include:

• High-quality, corrosion-resistant materials for long-lasting performance
• Compact, modular construction for easy installation in tight engine bays
• Efficient separation of oil vapor and blow-by gases to prevent intake contamination
• Durable fittings and hoses designed to withstand high temperatures and pressures
• Designed to support high-load and high-boost applications
• Includes all necessary hardware for a straightforward installation process

Construction & Design

The Radium AOS kit is built with precision-machined aluminum components and high-grade fittings to ensure a secure, leak-free connection. Its compact design integrates seamlessly with the factory crankcase ventilation system, providing a clean and efficient solution that maintains optimal airflow and oil separation. The internal baffling and filtration elements are engineered to maximize separation efficiency while minimizing pressure drop, supporting consistent engine response.

Installation & Fitment

Installation involves replacing the factory crankcase venting system with the Radium AOS kit, which requires basic mechanical skills and standard tools. The kit is designed for direct bolt-on fitment, with detailed instructions provided to facilitate a straightforward upgrade process. Proper fitment should be verified against the vehicle’s specific model and engine configuration to ensure compatibility.

What’s Included

The package includes the main separator unit, high-quality fittings, hoses, mounting brackets, and all necessary hardware for installation. Additional accessories or components are not required for a complete setup.

Ideal For

This product is perfect for Subaru owners and tuners who are upgrading their turbocharged engines for increased performance, reliability, and cleanliness. It is especially beneficial for those running modified or high-boost setups that generate higher crankcase pressures and blow-by gases.