Manley Performance Valve -Small Block Chevrolet S/F 1.500

Street Flo Valves

- XH-424 Stainless Exhaust Material
- Chrome Stems and Hard Tips
- Swirl Polished and Fully Machined
- Increased Flow with "Pro Flo" Underhead

Specs:

Type: Exhaust

Head Diameter: 1.500

Stem Diameter: .3415

Installed Height: Stock

O/A Length: 4.911

Tip Length: .250

Underhead Angle/Radius: Pro Flo: 12° x 3/8"

Margin: .060

Seat Width: .100

Top of Head: 7° Dish

Weight/ Grams: 89

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