Manley 12627B-8 Extreme Duty Exhaust Valve Set Inconel 32mm Ford 5.0L Coyote (8-Pack)

Constructed from XH-432 XtremeAlloy Inconel, these valves are built to withstand the punishing heat and mechanical stress found in the most demanding high-performance applications — including Top Fuel and Funny Car drag racing, big-block marine engines, and restricted-carburetor circle track builds. Inconel's exceptional heat and oxidation resistance makes it a benchmark material for exhaust valve construction in extreme-duty environments.

Key Features:

• Inconel XH-432 XtremeAlloy construction — superior heat and force resistance for extreme-duty applications
• 32.00 mm head diameter with a 25-degree dish top-of-head profile
• 4.274 in. overall length, 0.2345 in. stem diameter, 0.320 in. tip length
• 30-degree underhead angle with 11/32 in. underhead radius
• 0.050 in. margin width and 0.080 in. seat width
• Chrome stems and hard tips for exceptional wear resistance and longevity
• Swirl-polished underhead areas and fully machined combustion faces for improved airflow and combustion efficiency
• Bead Loc groove type for secure retainer engagement
• Sold as a complete kit of 8 valves

Designed for builders who refuse to compromise, the Manley Extreme Duty Series delivers race-proven performance for the Ford 5.0L Coyote platform. These valves are a direct fit for high-output builds where stock or standard aftermarket valves simply cannot keep up with sustained heat cycles and cylinder pressures.