Manley 6.6 Duramax Extreme Duty Exhaust Valve Kit | 2001-2016 GM Duramax 6.6L

Discover the extraordinary capabilities of Manley Performance Products’ Extreme Duty Series Valves. Engineered to cater to the demanding needs of Top Fuel and Funny Car drag racers, Big Block Chevy marine enthusiasts, and Small Block Chevy restricted carburetor circle track competitors, these valves are your ticket to unparalleled performance.

• Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.
• XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material construction.
• Built to Last: Featuring chrome stems and hard tips for exceptional longevity and wear resistance.
• Optimized Performance: Swirl polished under head areas and fully machined combustion faces improve airflow and combustion efficiency.

Specs:

• Head Diameter: 1.300 IN
• Stem Diameter: 0.2735 IN
• O/A Length: 4.985 IN
• Tip Length: 0.480 IN
• Margin Width: 0.060 IN
• Seat Width: 0.110 IN
• Top Of Head: Flat Face
• Underhead Angle: 30.00 DEG
• Underhead Radius: 13/32 IN
• Valve Quantity: 8