HKS SUPER SQV 4 EVO 4-6 CN9A/CP9A 4G63

The HKS Super SQV (Sequential Blow Off Valve) features a unique sequential valve structure and a differential pressure control system, allowing it to operate effectively across a broad range of boost levels, from low to high. Its pull-type relief design ensures stable operation regardless of the boost pressure. The valve is constructed with a high-quality, silver-coated aluminum die-cast body for durability and aesthetics, and a high-stiffness metal die-cast main secondary valve for reliable operation. A triple fin design at the center of the funnel produces a dynamic and aggressive sound, with an optional round fin available for sound tuning. The pull-type valve operation offers more precise relief of excess boost and is compatible with a wider range of boost pressure compared to typical push-type blow-off valves. It utilizes a dual valve structure, with a primary (small) valve that instantly opens upon throttle lift for quick initial discharge, and a secondary (large) valve that works in conjunction with the primary valve for optimal blow-off operation across all boost ranges without leakage.