Ferrea Chevrolet SB 1.625in 11/32in 5.35in 12 Deg S-Flo +.400 Super Alloy Exhaust Valve - Set of 8

If you're rebuilding the top end of your Chevrolet Small Block engine, these Ferrea S-Flo exhaust valves are a solid choice. This set includes eight valves, each measuring 1.625 inches in head diameter and featuring a 11/32 inch stem. They are designed with a 12-degree seat angle and a +.400 inch extended length, making them suitable for specific performance applications where increased lift or valve train geometry adjustments are needed.

These valves are constructed from Ferrea's Super Alloy material, which is known for its strength and resistance to high temperatures found in performance exhaust ports. The S-Flo design helps improve airflow by reducing turbulence around the valve head, contributing to better cylinder filling and exhaust scavenging. The +.400 inch extended length is a notable feature for builders who need to accommodate specific camshaft profiles or cylinder head porting that alters valve train geometry.

When working on a performance engine build, using well-built components like these Ferrea valves is crucial for reliability and performance. Ensure you have the correct valve springs and retainers that match the valve's weight and intended RPM range for optimal performance and longevity.