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Maximize Exhaust Flow with +1mm Oversize Valves

Unlock the true potential of your 4G63T engine with the GSC Power Division 31.5mm +1mm Oversize Exhaust Valve Set. Designed for high-output builds, these valves feature an increased head diameter to significantly improve exhaust scavenging and flow efficiency. The super alloy construction ensures these valves can survive the harsh environment of a high-boost, high-RPM turbocharged engine.

Key Benefits:

• Increased Flow: 31.5mm head diameter (+1mm over stock) for better exhaust evacuation.
• Super Alloy Strength: Engineered for extreme heat and pressure resistance.
• Chrome Polished: Reduces surface friction and carbon buildup.
• Complete Set: 8-piece set for a total exhaust side upgrade.

When building a high-performance 4G63T, exhaust flow is just as critical as intake. These oversize valves are the perfect complement to aggressive camshafts and ported cylinder heads. By reducing backpressure, they allow your turbocharger to spool faster and produce more power throughout the powerband. Ensure your engine build is ready for the track with these premium components from GSC Power Division. Find all your high-performance parts at GGCRACING.