Pontiac R/M 1.770in Exhaust Valves

The Pontiac R/M 1.770in Exhaust Valves from MANLEY are precision-engineered components designed for serious engine builders and performance enthusiasts who demand reliability in high-rpm applications. These valves are specifically designed for Pontiac V8 platforms, where exhaust valve durability and consistent sealing are critical for maintaining power output and cylinder pressure integrity.

Manufactured from premium alloy steel, these valves undergo heat treatment processes that allow them to withstand extreme combustion temperatures, contact stress, and thermal cycling without necking or burning. The 1.770-inch diameter is optimized to match OEM port dimensions while providing material quality that exceeds original equipment standards, reducing the risk of valve stretch, recession, or face erosion during extended high-load operation.

These Pontiac R/M exhaust valves are ideal for engine rebuilds, cylinder head restoration, and high-performance upgrades. Proper valve sizing prevents air-fuel mixture escape, maintains compression ratios, and ensures efficient exhaust scavenging, all of which directly impact horsepower delivery and engine longevity.