Subaru Impreza Intake Valves by GSC Power Division, +1mm Stainless Alloy 21-4N, Chrome Polished, for 2015–2027 models. Purpose-built intake valves offering a modest size increase for improved airflow potential and long-term reliability.

Manufactured from 21-4N stainless for high heat strength and corrosion resistance, these +1mm (35mm) valves are a smart choice for performance head work on Subaru Impreza WRX platforms. The chrome-polished finish promotes smooth guide travel and consistent sealing, helping maintain valve control at elevated temperatures and RPM. Ideal for enthusiasts upgrading cams, springs, or rebuilding a boosted street/track engine.

Features

• +1mm (35mm) intake head diameter for added flow potential
• 21-4N stainless construction resists heat and wear
• Chrome-polished finish for smooth operation and sealing
• Designed for 2015–2027 Subaru Impreza WRX applications
• Built by GSC Power Division

Have questions about fitment, supporting hardware, or machine work considerations? Call our team—we’re happy to help. We offer installation and customization services at our Austin, Texas and Los Angeles, California area locations: 512-982-9393 (TX), 562-981-6800 (CA).

If you’re considering multiple items, please contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov