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Granatelli Motor Sports

Granatelli Motor Sports Billet Valve Cover Breather 280113

Granatelli Motor Sports Billet Valve Cover Breather 280113

SKU:280113

In Stock—More than 10 available

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Granatelli Motorsports 280113 Billet Valve Cover Breather Adapter

Complete your custom crankcase ventilation system with the Granatelli Motorsports 280113 Billet Valve Cover Breather Adapter. Precision-machined from billet aluminum, this threaded adapter installs into a compatible -20 AN valve-cover port and provides a -10 AN ORB female connection for attaching a compatible breather, fitting, or custom ventilation component.

Clean Installation for Custom Valve-Cover Systems

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Designed for performance and custom engine builds, the Granatelli 280113 creates a secure threaded connection for adding a valve-cover breather or routing crankcase ventilation. Its compact billet construction provides a clean, professional alternative to improvised adapters and push-in fittings.

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CNC-Machined Billet-Aluminum Construction

The 280113 adapter is CNC-machined from billet aluminum for strength, dimensional accuracy, and resistance to the heat and vibration commonly found inside performance engine compartments. Its natural-machined finish delivers a clean motorsports appearance that complements polished, cast, or aftermarket aluminum valve covers.

The lower -20 AN male thread allows the adapter to screw into a compatible threaded valve-cover opening. The upper -10 AN ORB female port accepts a compatible male breather, hose-end adapter, or ventilation fitting, making it a practical foundation for custom PCV, catch-can, and crankcase-breather configurations.

Key Features and Benefits

  • Precision CNC-machined from durable billet aluminum
  • -20 AN male lower thread for compatible valve-cover ports
  • -10 AN ORB female upper port for a compatible breather or fitting
  • Supports custom crankcase-ventilation and oil-fill configurations
  • Threaded design provides a secure and professional installation
  • Durable construction resists engine heat and vibration
  • Natural billet-aluminum finish complements custom engine builds
  • Universal component sold individually

Ideal for Performance and Custom Engine Builds

Proper crankcase ventilation helps relieve pressure created by combustion blow-by and rotating engine components. Excessive crankcase pressure can contribute to oil leaks, seal problems, and unwanted oil vapor inside the engine compartment. When combined with the correct breather, hose, or catch-can system, the Granatelli 280113 provides a clean connection point for managing crankcase ventilation.

This adapter is well suited for street-performance vehicles, race cars, engine swaps, fabricated valve covers, and other applications using a compatible threaded valve-cover opening. It can also be incorporated into custom naturally aspirated, supercharged, or turbocharged ventilation systems.

Product Specifications

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Brand Granatelli Motor Sports
Part Number 280113
Product Type Valve-Cover Breather / Oil-Fill Adapter
Lower Thread -20 AN Male
Upper Port -10 AN ORB Female
Material CNC-Machined Billet Aluminum
Finish Natural Machined Aluminum
Fitment Universal—Requires Compatible Threaded Components
Quantity Sold Individually
UPC 802735040852
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Important Fitment Notice: This is a universal threaded adapter and is not a direct replacement for every factory oil cap or valve-cover breather. Installation requires a compatible -20 AN female valve-cover port and a compatible -10 AN ORB male breather or fitting. Verify all thread sizes, available clearance, sealing requirements, and ventilation-system compatibility before ordering. Breather, hose, fittings, and valve cover are not included unless otherwise stated.