High-Flow Billet Crankcase Ventilation System for Audi RS3 / TTRS EA855 EVO (DAZA / DNW)

Excessive crankcase pressure can reduce piston ring sealing, force oil past engine seals, increase oil contamination in the intake system, and ultimately affect both engine reliability and performance.

The JDY Race Crankcase Vent Kit has been engineered specifically for high-horsepower EA855 EVO engines to provide a significantly higher crankcase ventilation capacity while retaining the proven efficiency of the OEM oil separator, enable racers to be able to install any types of Race catch can.

Precision CNC-machined from billet aluminum, the JDY adapter features an internally baffled design and three configurable AN10 vent ports, allowing enthusiasts and professional engine builders to create a custom high-flow crankcase ventilation system using virtually any universal catch can.

Designed for extreme street cars, drag racing, roll racing, and circuit applications, this kit is the ideal foundation for engines producing well beyond factory power levels.

Key Features

Triple AN10 High-Flow Vent Ports

Unlike conventional crankcase vent adapters that offer one or two outlets, the JDY Race Crankcase Vent Kit features three integrated AN10 ports, providing exceptional ventilation capacity for high-output engines.

The included AN10 block-off plugs allow builders to configure one, two, or all three outlets depending on their crankcase ventilation strategy. perfect for 1200WHP + applications. 

Internal Multi-Baffle Design

An integrated internal baffle system helps separate suspended oil from crankcase gases before they exit the adapter.

Benefits include:

• Reduced oil carry-over
• Increased catch can efficiency
• Improved long-term engine reliability

OEM Gasket Compatibility

The adapter is designed to reuse the factory OEM gasket

Complete DIY Installation Kit

The JDY Race Crankcase Vent Kit includes the essential components needed to integrate with a universal catch can system.

Included are:

• Three AN10 male fittings
• Three AN10 block-off plugs
• OEM PCV dump line adapter
• PTFE hose assembly
• Stainless mounting hardware

Simply pair the kit with your preferred universal catch can and complete the system using AN10 hose and fittings suited to your vehicle layout.

CNC Billet Aluminum Construction

Manufactured from premium billet aluminum and precision CNC-machined for exceptional accuracy and durability.

Finished with a durable black anodized coating for superior corrosion resistance and a clean OEM+ appearance.

Three One-Way Check Valves Included

To ensure proper crankcase ventilation under all operating conditions, the JDY Race Crankcase Vent Kit includes three high-flow one-way check valves.

These check valves:

• Maintain proper one-way airflow from the engine to the catch can
• Help stabilize crankcase pressure during high-boost operation
• Improve system reliability on extreme horsepower applications
• Allow flexible routing for custom catch can configurations

Vehicle Compatibility

Audi

• RS3 8V
• RS3 8Y ( Pre2024 ) contact sales for 8Y2
• TTRS 8S

Engine Codes

• DAZ
• DNW

Kit comes with: 

• JDY Billet Race Crankcase Vent Adapter
• OEM Gasket
• 3 × AN10 Male Fittings
• 3 × AN10 Block-Off Plugs
• 3 × AN10 Check Valve 
• OEM PCV Dump port Adapter
• PTFE Hose Assembly
• Stainless Steel Mounting Hardware