Wehrs Machine Wheel Spacer - 1" Thick - Aluminum - Black Gauge Kits The relief valve has a

The relief valve has a pressure adjustable screw-in plug instead of a cup plug

This header system includes high-quality hardware

1979-1994 GMC G3500

Spark plug wire brackets and PCV grommet included

Wehrs Machine Wheel Spacer - 1" Thick - Aluminum - Black Gauge Kits The relief valve has aProduct Description: Wheel Spacer 5 x 5. 00 in Bolt Pattern 1 in Thick Aluminum Black Anodized Sold Individually Wehrs produces custom machined chassis and engine components designed for racing use. Their lineup includes everything from mounting brackets to cover panels, birdcage assemblies, and much more. Many of their parts are made from lightweight aluminum. They also offer a number of specialty tools. Wehrs Machine & Racing Products have provided