1.570 C/6 Exhaust Valve GM LS 8mm 4.915 AOL

The 1.570 C/6 Exhaust Valve GM LS 8mm is a high-performance component designed for LS engine builds, where precision valve geometry is crucial for enhancing combustion efficiency and power output. This exhaust valve is manufactured by FERREA, a reputable name among engine builders and performance shops globally, making it an essential part of any serious LS platform modification or rebuild.

Featuring a 1.570-inch head diameter and an 8mm stem, this exhaust valve is engineered to deliver optimal flow characteristics necessary for aggressive cam profiles and high-RPM applications. With an overall length (AOL) of 4.915 inches, it ensures proper valve train geometry when used with OEM or aftermarket LS valve seats and guides. The C/6 designation indicates a specific seat angle and head profile that maximizes exhaust gas velocity while maintaining sealing integrity under peak cylinder pressures.

Engine builders and mechanics looking to upgrade LS heads for increased displacement, boost, or naturally aspirated power can rely on this premium exhaust valve to withstand sustained heat cycles and provide longevity. Its precision manufacturing guarantees tight tolerances and consistent dimensions across every valve, which is critical for achieving cylinder-to-cylinder balance and predictable combustion.