Manley Performance Extreme Duty Exhaust Valve – Set of 8 | Multiple Fitments (12739-8) Manley Performance

Big Block Chevrolet Extreme Duty Exhaust Valves – Set of 8 by Manley Performance

Top Fuel and Funny Car drag racers, Big Block Chevy marine enthusiasts, and Small Block Chevy restricted carburetor circle track competitors will all benefit by the use of XtremeAlloy exhaust valves. Exotic steel is required simply because of the enormous heat imposed on the exhaust valves in these applications.

Features

• Head Diameter: 1.900″
• Stem Diameter: .3415 ”
• Installed Height: .100 Longer
• O/A Length: 5.522″
• Tip Length: .250″
• Underhead Angle/Radius: 18° x 1/2”
• Margin: .075”
• Seat Width: .085”
• Top Of Head: 12° Dish
• Chrome Stems and Hard Tips
• Swirl Polished and Fully Machined
• Reduced Stem Diameter
• XH-432 XtremeAlloy Exhaust Material

Benefits

• More Hot Hardness and High Temperature Strength than any competitive offerings
• Greater Flow and Less Weight

Please Note: The image provided is generic and may not be an accurate representation of the product you will receive

Applications

• 1965, 1968–1974 Chevrolet Corvette
• 1965–1975 Chevrolet Chevelle
• 1967–1972 Chevrolet Camaro
• 1968–1970 Chevrolet Nova
• 1970–1975 Chevrolet Monte Carlo
• 1970–1975 Chevrolet El Camino
• 1965–1972 Chevrolet Biscayne, Chevrolet Bel Air, Chevrolet Impala, Chevrolet Impala SS
• 1965–1976 Chevrolet Caprice
• 1996–1999 Chevrolet Suburban 2500/GMC Suburban 2500

What’s In The Box?

• 8 – Valves

Warranty

• Manley products, due to their intended use, are sold without warranty.