Granatelli -12AN Screw-In Billet Valve Cover Breather Baffle Kit – No Welding – 280112

Granatelli -12AN Screw-In Billet Valve Cover Breather Baffle Kit – 280112

Add a professional -12AN crankcase ventilation connection to your valve covers without welding with the Granatelli Motor Sports 280112 Screw-In Valve Cover Breather Baffle Kit. Designed for custom street, race and high-horsepower engine builds, this kit provides a clean and secure way to add a breather, catch-can hose, or additional crankcase vent wherever you need it.

The precision-machined -12AN male connection works with compatible -12AN screw-on breathers, hose ends and catch-can plumbing, while the integrated internal baffle helps reduce unwanted oil from being pushed out through the breather system.

ADD A -12AN BREATHER PORT — WITHOUT WELDING

A simple solution for adding or relocating crankcase ventilation on custom valve covers, race engines and high-performance builds.

Key Features

• -12AN male threaded connection
• Adds a valve-cover breather or crankcase vent without welding
• Compatible with -12AN screw-on breathers, hose ends and catch-can plumbing
• Integrated internal baffle helps control oil carryover
• Helps vent excess crankcase pressure and blow-by gases
• Excellent for custom valve covers without existing breather provisions
• Can also be used when an additional breather location is needed
• Ideal for naturally aspirated, turbocharged and supercharged builds
• Suitable for street, street/strip and race applications
• Secure screw-in design with lock nut and sealing components
• No welding required
• Made in the USA

Great for Custom Builds: If your valve covers do not have a breather provision—or the existing location does not work with your catch-can or engine-bay layout—the Granatelli 280112 gives you the freedom to add a -12AN connection in a more convenient location.

Integrated Oil-Control Baffle

Venting crankcase pressure is important, but allowing excessive oil to travel through the breather system can create a mess and contaminate surrounding components. The integrated internal baffle is designed to help separate oil from crankcase vapor before it reaches the breather or catch-can line, helping keep the engine bay cleaner while maintaining effective ventilation.

Perfect for Performance Crankcase Ventilation

High-RPM, high-compression and forced-induction engines can generate significantly more crankcase pressure and blow-by than a stock engine. Adding additional breather capacity or connecting the valve covers to a properly designed catch-can system can help manage that pressure in demanding applications. The Granatelli -12AN baffle kit gives builders a clean, compact connection point for custom ventilation systems.

Ideal For

What's Included

Installation Notice: Installation requires drilling the valve cover for the screw-in baffle assembly. The required valve-cover opening is 1.625 inches. Carefully verify the required hole size and installation location before drilling.

Make sure there is adequate clearance inside the valve cover for the internal baffle and outside the cover for the -12AN fitting, hose, breather or catch-can connection. This is a universal/custom installation and fitment should be confirmed before modifying the valve cover.