Ford 4.6L R/M 36mm Exhaust Valves

The Ford 4.6L R/M 36mm Exhaust Valves from MANLEY are precision-engineered components designed for builders and enthusiasts seeking reliability and performance in high-output 4.6-liter Ford applications. These exhaust valves are essential replacements or upgrades for serious engine builders who demand OEM-quality construction with enhanced durability. Whether you're rebuilding a classic Fox-body Mustang or a Cobra, these valves provide the thermal resistance and material integrity required for sustained power delivery and longevity in demanding driving conditions.

MANLEY's 36mm exhaust valves utilize premium stainless steel construction to withstand extreme exhaust gas temperatures and valve-seat pressure cycles. The 36mm head diameter is sized for optimal flow characteristics in 4.6L cylinder heads while maintaining proper sealing geometry and durability under boost or high-RPM conditions. The R/M designation indicates these valves are designed for both naturally aspirated and supercharged applications, with metallurgy formulated to resist thermal fatigue, corrosion, and pitting.

These valves are ideal for engine rebuilds, head porting projects, and forced-induction installations where stock or marginal exhaust flow becomes a bottleneck. Professional machine shops and experienced enthusiasts will appreciate the precise manufacturing tolerances that ensure a correct fit with original or aftermarket valve seats, preventing leakage and maintaining combustion chamber integrity across the powerband.