Manley Performance Big Block Chevrolet Severe Duty "Pro Flo" Valves 1.880

Features

- XH-428 Stainless Exhaust Material
- Improved Flow with "Pro Flo" Underhead
- Chrome Stems and Hard Tips
- Swirl Polished and Fully Machined

Specification

Head Diameter: 1.880
Stem Diameter: .3715
Installed Height: Stock
O/A Length: 5.374
Tip Length: .220
Underhead Angle/Radius: Pro Flo: 10° x 3/8"
Margin: .085
Seat Width: .100
Top of Head: 5° Dish
Wgt/Grams: 132