Brian Crower BC3101-1 Exhaust Valve 30.5mm Mitsubishi 4G63 Evo Eclipse

The Brian Crower BC3101-1 is a premium individual exhaust valve engineered for Mitsubishi 4G63 engines found in Evolution and Eclipse models. This standard size 30.5mm exhaust valve is sold individually for single-valve replacement needs.

Construction and Materials:

• One-piece forged design with friction-welded Stellite tip for maximum durability
• Premium grade heat-resistant stainless steel construction (EV16 or EV8-Nb/w)
• Chrome coated finish for corrosion resistance
• Hardened to 52Rc for extreme durability
• Capable of withstanding temperatures exceeding 1400°F

Performance Features:

• Undercut stem design reduces weight for extended RPM potential
• Fully machined with swirl-polished finish for optimal airflow
• Dished head design for additional weight savings and improved valve control
• Enhanced air/fuel flow in and out of combustion chamber
• Engineered for high boost and high RPM applications

This valve features Brian Crower's proven design that maintains consistent material grain flow through the two-step forging process. The undercut stem above the head area not only reduces overall weight but significantly improves combustion chamber efficiency. Ideal for performance rebuilds, racing applications, or as a replacement for worn valves in turbocharged and naturally aspirated 4G63 engines.