GM LS 1.615 S/A Exhaust Valves 5.227 OAL

The GM LS 1.615 S/A Exhaust Valves by FERREA represent a critical upgrade for serious LS engine builders and performance enthusiasts pursuing maximum horsepower and reliability. These valves are engineered for high-rpm applications where stock components fall short, particularly in forced induction and naturally aspirated builds targeting 500+ hp. Whether you're rebuilding a LS1, LS2, or LS3 cylinder head, premium exhaust valves directly impact scavenging efficiency, peak power delivery, and engine longevity under sustained boost or high-revving conditions.

FERREA's commitment to metallurgy and precision machining sets these exhaust valves apart from OEM replacements. The 1.615-inch head diameter and 5.227-inch overall length are meticulously toleranced to seat perfectly in factory LS cylinder heads while accommodating higher lift and duration cam profiles without coil bind or interference. The stem-to-head ratio and material composition provide superior heat dissipation and resistance to thermal fatigue, critical when exhaust gas temperatures climb during turbo or supercharger operation. These valves withstand repeated thermal cycling and aggressive valve events that would cause premature failure in lesser components.

Professional engine builders and tuners specify FERREA exhaust valves for competitive motorsports, street strip cars, and high-horsepower LS swaps where reliability cannot be compromised. Installation requires proper valve seat machining and spring pressures matched to your camshaft specification—do not install without consultation of your cam manufacturer's recommendations. Pair these with quality intake valves, hardened pushrods, and quality springs to ensure your LS power plant delivers consistent performance weekend after weekend. The 5.227-inch OAL allows fitment in standard LS18, LS24, and comparable casting heads commonly found in third-gen Camaros, Corvettes, and truck platforms.