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High-Performance Exhaust Valves for Subaru EJ Engines

Maximize the thermal efficiency and reliability of your Subaru EJ20 or EJ257 engine with the GSC Power Division Super Alloy Exhaust Valve. Designed for high-boost applications and aggressive cam profiles, this 33mm (+1mm oversized) valve is engineered to withstand extreme combustion temperatures that would cause standard valves to fail.

Technical Specifications

• Material: High-temperature Super Alloy
• Head Diameter: 33mm (+1mm over stock)
• Finish: Chrome Polished for reduced friction
• Application: Subaru EJ20 / EJ257 Turbo Engines

The GSC Super Alloy construction provides superior resistance to heat-induced fatigue and deformation. By utilizing a +1mm oversized head, you allow for increased exhaust gas flow, which is critical for reducing backpressure in high-horsepower turbo setups. Whether you are building a street-driven WRX or a dedicated track-spec STI, these valves offer the durability required for sustained high-RPM operation. The precision-machined surface ensures an excellent seal against the valve seat, optimizing compression and power delivery across the entire RPM range. Each valve is meticulously crafted to meet the rigorous demands of professional engine builders. For all your high-performance engine component needs, trust the selection at GGCRACING.