Competition Products Severe Application Competiton 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 exact tolerances. Lowest possible weight without sacrificing strength. Ultimate tensile strength, 75,400 p.s.i. at 1,382°F. Valves have a slight undercut (.020"-.040"). 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 Valves
Application: Chevrolet Big Block V8
Head Diameter: 1.880"
Stem Diameter: 11/32" (.3415")
Installed Height: +.100
Overall Length: 5.522"
Material: 21-4N Stainless Steel
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: 10 Degrees
Under Head Radius: .375"
Margin: .075"
Seat Width: .100"
Top of Head: 6 Degree Dish
Weight: 95 grams
Manufacturer: Competition Products
Manufacturer's Part Number: CMP18811
Weight: 0.25 lbs.
Warranty: Race Application, No warranty expressed or implied.
Quantity: Sold as Each
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