Manley Performance Big Block Chevrolet Race Master Valves Stock 3/8" Stem Diameters

Race Master Valves Stock 3/8" Stem Diameters

- XH-426 Stainless Exhaust Material
- Chrome Stems and Hard Tips
- Swirl Polished and Fully Machined

Specs:

Type: Exhaust

Head Diameter: 1.880

Stem Diameter: .3715

Installed Height: Stock

O/A Length: 5.422

Tip Length: .250

Underhead Angle/Radius: 15° x 1/2"

Margin: .075

Seat Width: .100

Top of Head: 9° Dish

Weight/ Grams: 139

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