Kevko Racing Evac Check Valve K139-1 1/2in NPT — Crankcase Components

SKU: GLWB_K139-1
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Kevko Racing Oil Pans and Components

Kevko Racing Oil Pans and Components engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kevko Racing Oil Pans and Components lineup with fast shipping and expert fitment support — order with confidence.

High-Flow Crankcase Evacuation Check Valve

The Kevko K139-1 Check Valve is a critical component for maintaining a functional crankcase evacuation system. Designed to allow one-way flow, this valve ensures that crankcase gases are pulled out of the engine while preventing any backflow. Featuring a 1/2 inch NPT female inlet and a 5/8 inch hose barb outlet, it is perfectly sized for standard racing evacuation setups. Its robust steel construction with a zinc oxide finish ensures long-lasting durability in the harsh under-hood environment of a race car.

Key Specifications

  • 1/2 inch NPT female inlet
  • 5/8 inch hose barb outlet
  • Durable steel construction
  • Corrosion-resistant zinc oxide finish
  • Ensures one-way flow for evac systems

A failed check valve can lead to improper crankcase pressure, causing oil leaks and reduced engine performance. The K139-1 is built to provide a reliable seal and consistent operation, giving you peace of mind during long races. Whether you are replacing a worn-out valve or building a new evacuation system from scratch, this part offers the precision and reliability required by professional engine builders. Its compact design allows for easy integration into existing plumbing, making it a simple yet effective upgrade for your engine's health. Trust GGCRACING for the high-quality components that keep your race car running at peak performance.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Kevko Racing Oil Pans and Components

Kevko Racing Oil Pans and Components engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kevko Racing Oil Pans and Components lineup with fast shipping and expert fitment support — order with confidence.

High-Flow Crankcase Evacuation Check Valve

The Kevko K139-1 Check Valve is a critical component for maintaining a functional crankcase evacuation system. Designed to allow one-way flow, this valve ensures that crankcase gases are pulled out of the engine while preventing any backflow. Featuring a 1/2 inch NPT female inlet and a 5/8 inch hose barb outlet, it is perfectly sized for standard racing evacuation setups. Its robust steel construction with a zinc oxide finish ensures long-lasting durability in the harsh under-hood environment of a race car.

Key Specifications

  • 1/2 inch NPT female inlet
  • 5/8 inch hose barb outlet
  • Durable steel construction
  • Corrosion-resistant zinc oxide finish
  • Ensures one-way flow for evac systems

A failed check valve can lead to improper crankcase pressure, causing oil leaks and reduced engine performance. The K139-1 is built to provide a reliable seal and consistent operation, giving you peace of mind during long races. Whether you are replacing a worn-out valve or building a new evacuation system from scratch, this part offers the precision and reliability required by professional engine builders. Its compact design allows for easy integration into existing plumbing, making it a simple yet effective upgrade for your engine's health. Trust GGCRACING for the high-quality components that keep your race car running at peak performance.

Product Details

Product Description

About Kevko Racing Oil Pans and Components

Kevko Racing Oil Pans and Components engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kevko Racing Oil Pans and Components lineup with fast shipping and expert fitment support — order with confidence.

High-Flow Crankcase Evacuation Check Valve

The Kevko K139-1 Check Valve is a critical component for maintaining a functional crankcase evacuation system. Designed to allow one-way flow, this valve ensures that crankcase gases are pulled out of the engine while preventing any backflow. Featuring a 1/2 inch NPT female inlet and a 5/8 inch hose barb outlet, it is perfectly sized for standard racing evacuation setups. Its robust steel construction with a zinc oxide finish ensures long-lasting durability in the harsh under-hood environment of a race car.

Key Specifications

  • 1/2 inch NPT female inlet
  • 5/8 inch hose barb outlet
  • Durable steel construction
  • Corrosion-resistant zinc oxide finish
  • Ensures one-way flow for evac systems

A failed check valve can lead to improper crankcase pressure, causing oil leaks and reduced engine performance. The K139-1 is built to provide a reliable seal and consistent operation, giving you peace of mind during long races. Whether you are replacing a worn-out valve or building a new evacuation system from scratch, this part offers the precision and reliability required by professional engine builders. Its compact design allows for easy integration into existing plumbing, making it a simple yet effective upgrade for your engine's health. Trust GGCRACING for the high-quality components that keep your race car running at peak performance.

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