Description

VTT Billet High-FLOW Crankcase Ventilation Adapter for Hurricane SO & HO Engines

Building a high-horsepower Hurricane SO or HO? As boost pressure increases, so does crankcase pressure. If that pressure is not properly managed, it can lead to oil leaks, excessive oil consumption, smoking, reduced ring seal, power loss, and in severe cases, engine damage.

Proper crankcase evacuation is critical on any high-performance turbocharged engine, especially as boost levels climb well beyond factory calibration.

While many vent systems rely on relatively small -10AN or -12AN plumbing, we’ve found through our own development that these sizes quickly become a restriction on high-boost Hurricane builds. To address this, VTT developed a significantly higher-flow solution capable of supporting everything from aggressive street cars to dedicated race vehicles.

Our billet vent adapter replaces the factory oil cap and securely locks into the valve cover, providing a robust -16ORB connection that can be configured with a variety of fitting sizes to suit your specific build.

Whether you’re running a mild upgraded turbo setup or a full race engine, this system provides the airflow necessary to properly evacuate crankcase pressure while integrating seamlessly into your catch can or breather system.

Features

• Precision CNC-machined billet aluminum construction
• Attractive billet oil cap design
• Direct replacement for the factory Hurricane oil cap
• Secure OEM-style locking engagement
• Integrated internal venting passages designed to help separate large oil droplets before they enter the catch can system
• High-flow -16ORB outlet accepts multiple fitting configurations
• Supports vent sizes from -12AN through -20AN
• Compatible with virtually any external catch can or crankcase evacuation system
• Designed specifically for high-boost, high-horsepower Hurricane SO & HO applications

Why Upgrade?

Factory crankcase ventilation systems are designed around factory power levels and emissions requirements.

As boost pressure, cylinder pressure, and engine output increase, blow-by volume increases dramatically. If that pressure cannot escape efficiently, it begins working against the piston rings, reducing ring seal while forcing oil vapor throughout the engine.

A properly sized crankcase ventilation system helps:

• Reduce crankcase pressure
• Improve ring seal
• Reduce oil leaks
• Minimize oil consumption
• Reduce smoking under boost
• Improve engine reliability at high power levels

Available Fitting Options

Choose the fitting that best matches your plumbing requirements.

• -16ORB to -12AN Male (17.4mm Hose ID)
• -16ORB to -12AN Male with 1/8″ NPT Sensor Port (Ideal for crankcase pressure data logging)
• -16ORB to -16AN Male (22.2mm Hose ID)
• -16ORB to -16AN Male with 1/8″ NPT Sensor Port
• -16ORB to -20AN Male (28.5mm Hose ID)
• Low Profile 90° -12AN Male (Maximum hood clearance)
• Low Profile 90° -16AN Male (Maximum hood clearance)
• -16AN One-Way Check Valve
  • Maintains crankcase vacuum during idle and light throttle operation while allowing unrestricted venting under boost.
  • Additional fittings may be required depending on your installation.

Any fitting utilizing a -16ORB connection is compatible with this adapter.

Important Notes

• Hose, hose ends, and catch can are not included and must be supplied by the installer.
• Certain fitting configurations may require an additional 4–5 business days before shipment.
• Hood clearance should be verified when selecting taller straight fittings. Our low-profile 90° fittings provide the greatest clearance for tight engine bays.

Kit Includes

• (1) VTT Billet Hurricane Vented Oil Cap Adapter
• Fitting(s) selected at checkout