Exhaust Seat 1.660 OD x 1.345 ID x .375 Deep

The Exhaust Seat 1.660 OD x 1.345 ID x .375 Deep from BRODIX is a precision exhaust valve seat engineered for high-performance marine and boating applications. Whether you're rebuilding a cylinder head on an inboard engine or restoring a vintage outboard, this component plays a critical role in sealing exhaust gases and maintaining engine integrity under sustained throttle and variable load conditions. Marine environments demand reliability, and a properly seated exhaust valve prevents blow-by, compression loss, and costly engine damage during extended runs on open water.

Manufactured to BRODIX's exacting standards, this exhaust seat features a 1.660-inch outer diameter with a 1.345-inch inner diameter and a 0.375-inch depth—dimensions that provide optimal sealing surface contact against the valve face. The precision tolerances ensure consistent valve-to-seat contact geometry, critical for preventing heat erosion and maintaining combustion chamber pressure across the RPM range. Weighing just 0.06 pounds, the compact design integrates seamlessly into modern and classic marine powerplants alike, where thermal cycling and salt spray exposure demand corrosion-resistant materials and superior valve seating performance.

Engine builders and marine technicians rely on BRODIX exhaust seats for cylinder head work on both freshwater and saltwater applications. Compatibility depends on your specific engine platform and cylinder head casting—verify bore size and valve pocket dimensions before ordering. Installation requires proper valve seat machining equipment and precision boring to achieve concentricity with the valve guide, ensuring the seat face mates flush with the valve margin. This component is essential for anyone undertaking a professional-grade marine engine rebuild or restoration project.