GSC Intake Valves 37mm / +1mm Standard - Set of 8 (Subaru EJ20 / EJ257 Turbo) GSC2014-8

GSC Power-Division +1mm Oversized Intake Valve Set, 37mm (Subaru EJ20 / EJ257 Turbo) - GSC2014-8

For a complete valvetrain overhaul or high-performance engine build on your Subaru EJ series turbo, the GSC Power-Division +1mm Oversized Intake Valve Set is an essential upgrade. This comprehensive set of eight valves is meticulously engineered to provide superior airflow and durability. Using cutting-edge 3D design and simulation, GSC has created a stronger, higher-flowing valve head that outperforms standard designs. The superior materials and design minimize valve face distortion, providing a better seal and more consistent performance throughout the engine's lifespan.

Key Performance Features

• Complete Set of 8: This kit includes eight intake valves, providing everything you need for a full cylinder head upgrade or rebuild.
• +1mm Oversized Design: The larger 37mm head diameter is engineered to significantly increase airflow, allowing your engine to breathe better and produce more power.
• Swirl Polished Heads: Precision polishing promotes smoother airflow over the valve, optimizing performance.
• Back-Cut Design: Reduces valve weight, a critical factor for high-RPM and high-boost applications, and allows for more aggressive cam profiles without increasing valve spring seat pressures.
• Micro-Polished Stems: The valve stems feature a micro-polished finish to reduce oil retention and friction, ensuring a smoother motion within the valve guide for extended longevity.
• Advanced 21-4N Stainless Material: Constructed from a modified stainless alloy specifically chosen for intake valves, offering exceptional durability and performance.
• Hardened Tips: Tips are hardened or feature a stellite wafer for maximum resistance to wear from the rocker or tappet, extending valvetrain life.

Installation & Fitment

The GSC2014-8 valve set is a direct fit for Subaru EJ20 and EJ257 turbo engines. Note: Due to the +1mm oversized nature, cylinder head machine work is required for proper installation. GSC has fine-tuned the valve tip lengths to ensure proper valvetrain geometry and reduce installation time by minimizing the need for extensive valve tipping during lash adjustments. These valves are compatible with both OEM and upgraded keepers/locks. While not mandatory, it is highly recommended to use new valve locks for any performance application, as used locks may have material grooving from previous use.