Manley Performance Big Block Chevy Stock 3/8" Stem Diameter Race Flo Exhaust Valves

Race Flo Valves Stock 3/8" Stem Diameters

- XH-426 Stainless Exhaust Material
- Chrome Stems and Hard Tips
- Swirl Polished and Fully Machined
- Improved Flow with "Pro Flo" Underhead

Specs:

Type: Exhaust

Head Diameter: 1.725

Stem Diameter: .3715

Installed Height: Stock

O/A Length: 5.350

Tip Length: .220

Underhead Angle/Radius: Pro Flo: 10° x 3/8"

Margin: .060

Seat Width: .100 

Top of Head: 5° Dish 

Weight/ Grams: 120

Set of 8