Manley Performance Big Block Chevrolet Pontiac "Pro Stock" & Dart "Big Chief" 1.900

Pontiac "Pro Stock" & Dart "Big Chief" Extreme Duty & Severe Duty Valves 11/32" Stems

Specs:

Type: Exhaust

Head Diameter: 1.900

Stem Diameter: .3415

Installed Height: Stock

O/A Length: 6.380

Tip Length: .250

Underhead Angle/Radius: 25° x 3/8"

Margin: .085

Seat Width: .100

Top of Head: 20° Dish

Weight/ Grams: 144

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