Manley Performance Small Block Chevrolet Race Master Valves 5/16" (.311") Stem Exhaust

Features

- No Need for Inserted Tips or Wear Caps
- Chrome Stems and Hard Tips
- Swirl Polished and Fully Machined
- Thin Stem for Increased Flow and Light Weight

Specification

Head Diameter: 1.600
Stem Diameter: .3110
Installed Height: .100 Longer
O/A Length:  5.040
Tip Length: .290
Underhead Angle/Radius: 15° x 1/2”
Seat Width: .080
Margin: .100
Top of Head: 9° Dish
Wgt/Grams: 94