BBC 1.880 Exh Valve 11/32 5.450 OAL

The BBC 1.880 Exh Valve 11/32 5.450 OAL from Air Flow Research is a precision-engineered exhaust valve designed specifically for big-block Chevrolet engines. This valve is essential for engine builders and performance enthusiasts who are upgrading cylinder heads to enhance exhaust flow and overall engine efficiency. Whether for street performance or competition-grade builds, this valve is built to meet high-performance demands.

Featuring a 1.880-inch head diameter, the valve is optimized for superior gas flow characteristics while maintaining structural integrity under extreme combustion pressures. The 11/32-inch stem diameter ensures proper guide clearance and oil control, while the 5.450-inch overall length (OAL) guarantees correct seating depth in standard BBC cylinder heads. Manufactured with high-quality materials, this valve is designed to withstand thermal stress, oxidation, and valve seat recession, making it suitable for high boost, nitrous, or extended high-RPM applications.

Serious BBC builders and performance shops trust AFR exhaust valves for restoring or upgrading AFR cylinder heads and other premium big-block casting solutions. It is recommended to verify compatibility with your specific head casting and valve seat dimensions before purchase by consulting your head manufacturer's specification sheet or contacting a performance specialist.