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Competition Products Severe Application Stainless Steel Valves
Premium grade annealed 21-4N. Deep hard chrome plated stems. Hardened to 55 r.c. to withstand the toughest roller-tip punishment. Every valve made is hardness checked, chrome plated, ground and polished to exacting tolerances. Lowest possible weight without sacrificing strength. Ultimate tensile strength, 75,400 p.s.i. at 1,382 degrees F. Yield strength 46,500 p.s.i. at 1,382 degrees F. Valves have undercut stems to promote flow. Computer designed for severe applications.
Designed for Severe Competition Use
One Piece 21-4N Stainless Steel Forging
Deep Hard Chrome Stems
Undercut for Increased Flow
Hard tips
Swirl polished
Fully Machined
Part Type: Exhaust Valves
Style: Competition Products Severe Application Stainless Steel Valves
Application: Chevrolet Big Block V8
Head Diameter: 1.880"
Stem Diameter: 11/32" (.3415")
Installed Height: Standard
Overall Length: 5.422"
Material: 21-4N Stainless Steel
1-Piece Design: Yes
Hard Chrome Stems: Yes
Undercut Stem: Yes
Black Nitrided: No
Swirl Polished: Yes
Lock Groove Type: Conventional
Lock Groove Quantity: Single
Tip Length: .250"
Under Head Angle: 10 Degrees
Under Head Radius: .375"
Margin: .075"
Seat Width: .100"
Top of Head: 6 Degree Dish
Weight: 121 grams
Manufacturer: Competition Products
Manufacturer's Part Number: 18810
Weight: 0.30 lbs.
Warranty: Race Application, No warranty expressed or implied.
Quantity: Sold as Each
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