BBF S/D 1.760in Exhaust Valve

The MANLEY BBF S/D 1.760in Exhaust Valve (MAN11801-1) is a severe-duty exhaust valve engineered for high-performance Big Block Ford engines that demand durability under extreme combustion temperatures and cylinder pressures. This precision-machined component is purpose-built for racing applications, forced-induction builds, and street performance engines where factory valve materials fall short. The 1.760-inch head diameter optimizes flow characteristics while maintaining structural integrity in demanding operating conditions.

Constructed from premium stainless steel, this exhaust valve features a 0.342-inch valve stem and measures 5.167 inches in length—specifications that ensure proper seating, reliable operation, and compatibility with Big Block Ford cylinder heads. The severe-duty classification indicates enhanced heat resistance and superior metallurgical properties compared to standard valves, allowing sustained performance at elevated engine speeds and boost levels without valve recession, seat degradation, or premature failure. Stainless steel construction provides corrosion resistance and maintains dimensional stability across thermal cycling, critical for long-term reliability in turbocharged and supercharged applications.

Engine builders and performance enthusiasts targeting Big Block Ford platforms benefit from this valve's proven track record in competition and high-output street engines. Installation requires proper valve seat machining and spring selection matched to your specific camshaft and intended engine output. Each valve is sold individually, so complete exhaust valve replacement typically requires multiple units depending on cylinder count and desired symmetry in your valvetrain.