LS7 R/M 1.615 Exhaust Valves

The LS7 R/M 1.615 Exhaust Valves by MANLEY represent a critical upgrade for serious LS7 engine builders and high-performance enthusiasts who demand reliable, race-proven components. These valves are engineered to handle the extreme demands of modified LS7 powerplants, where factory exhaust valves often become a bottleneck under boost, nitrous, or aggressive naturally aspirated builds. Whether you're building a street beast or prepping for circuit duty, quality exhaust valves are non-negotiable for sustained horsepower and durability.

MANLEY's 1.615-inch head diameter design optimizes flow characteristics while maintaining structural integrity under high combustion pressures and elevated RPM environments. The R/M designation indicates these are race-and-marine specification valves, built with premium alloy steel construction and precision-honed seats to minimize exhaust gas leakage—critical for maximizing scavenging efficiency and preventing hot spots that lead to warping or premature failure. MANLEY's manufacturing tolerances ensure consistent valve geometry, symmetrical heads, and uniform stem dimensions that allow zero-compromise engine assembly and reliable sealing across repeated thermal cycles.

These exhaust valves suit LS7 engine platforms across a wide range of applications—from fuel-injected street cars to full-race powerplants—wherever factory components have proven insufficient. Install them as a complete valve train upgrade alongside quality springs, retainers, and keepers to unlock the full potential of LS7 heads. Proper valve seat work and careful installation per OEM specifications ensure optimal performance and longevity, making this investment essential for any builder serious about LS7 reliability and power.