SBF S/D 1.710in Exhaust Valve

The MANLEY SBF S/D 1.710in Exhaust Valve is engineered for serious engine builders and mechanics who demand severe-duty performance from their Ford Cleveland platforms. This stainless steel exhaust valve is purpose-built to handle extreme combustion temperatures, high RPM operation, and aggressive tuning where stock or mild-performance valves fall short. Whether you're rebuilding a race engine, upgrading a street performance build, or restoring a vintage Cleveland-based motor, this valve provides the durability and thermal stability required for reliable, long-term operation under sustained stress.

Manufactured by MANLEY—a trusted name in high-performance valvetrain components—this severe-duty exhaust valve features a 1.710-inch head diameter with a 0.342-inch valve stem, optimized to flow exhaust gases efficiently while resisting warping and thermal fatigue. The stainless steel construction provides superior corrosion resistance and heat dissipation compared to standard iron valves, critical for engines running lean mixtures, nitrous oxide, or forced induction. At 5.067 inches in length, the valve integrates seamlessly into original Cleveland cylinder head ports, maintaining proper sealing geometry and seat contact pressure for consistent performance across multiple heat cycles.

This valve is ideal for engine builders working on 351C, 351M, and 400 cubic-inch Cleveland engines destined for high-output street, street/strip, or full competition service. Installation pairs with hardened valve seats and precision-ground seats to maintain optimal sealing; verify seat diameter and angle match your cylinder head specifications before ordering. The 0.3-pound valve ships individually, so plan your order based on the number of cylinders being worked—typically eight valves per V8 engine. For maximum longevity, pair with quality valve springs rated for your intended RPM range and use fresh valve stem seals during assembly.