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Manley Severe Duty Valve, Chevrolet BB Big Chief/Duke, 11/32", 1.900" Exhaust, 6.380", Each |
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Manley Severe Duty Exhaust Valves
Manley's signature in the performance and industry. The XH-428 stainless exhaust material is offered by no competitor in the world. Ultimate tensile strength of the XH-428 at 1500 degrees F is nearly double of the competitors EV-8.
Severe Duty XH-428 Stainless Exhaust Material
Chrome Stems Hard Tips
Fully Machined Swirl Polished
Part Type: Exhaust Valves
Style: Manley Severe Duty Valves
Application: Chevrolet Big Block V8 Dart Big Chief, Brodix Big Duke, Pontiac Pro Stock
Head Diameter: 1.900"
Stem Diameter: 11/32" (.3415")
Installed Height: Standard
Overall Length: 6.380"
Material: XH-428 Stainless Exhaust Material
1-Piece Design: Yes
Hard Chrome Stems: Yes
Undercut Stem: No
Black Nitrided: No
Swirl Polished: Yes
Lock Groove Type: Conventional
Lock Groove Quantity: Single
Tip Length: .250"
Under Head Angle: 25 Degrees
Under Head Radius: .375"
Margin: .085"
Seat Width: .100"
Top of Head: 20 Degree Dish
Weight: 144 grams
Manufacturer: Manley Performance
Manufacturer's Part Number: 11581-1
Weight: 0.35 lbs.
Warranty: Race Application, No warranty expressed or implied.
Quantity: Sold as Each
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