Ferrea Chevy BB 2.25in 11/32in 5.625in 0.25in 12 Deg S-Flo +.400 Comp Plus Intake Valve - Set of 8

These Ferrea S-Flo intake valves are built for Chevy big-block engines, featuring a 2.25-inch head diameter and a 5.625-inch overall length with a 11/32-inch stem. The S-Flo design is a notable advancement in valve technology, utilizing a unique undercut stem and a specialized swirl polishing process to improve airflow characteristics. This design helps to reduce valve-seat deposits and can lead to a more efficient combustion process.

Each valve in this set of eight is constructed from high-quality steel, chosen for its strength and durability under the high temperatures and pressures found in performance engines. The +.400 Comp Plus design indicates an extended length, which is often necessary when using higher-lift camshafts or when modifying cylinder heads to accommodate different valve train components. The 12-degree seat angle is a standard specification that ensures proper sealing with compatible valve seats.

When rebuilding or upgrading the top end of your Chevy big-block, these Ferrea valves offer a well-built option for improved performance and reliability. They are designed to work with compatible valve springs and retainers to ensure proper valve train geometry and function.