Black HKS SQV blow off valve
The HKS type Blow-Off Valve (SSQV) is a dual stage pull type blowoff / bypass valve. Being of a pull-type valve structure, the SSQV can not physically leak under any level of boost because boost pressure also keeps the valve closed against its seat. The SSQV is actuated by pressure alterations only, not by the rate of pressure or vacuum in the line, which ensures a quick valve response and complete closure when off throttle.

For maximum performance, the Dtune SSQV incorporates both a small primary valve for ultra quick activation, along with a larger secondary valve for additional discharge capacity. The SSQV is engineered to initially open the small primary valve at light throttle and load conditions, then sequentially opens the secondary valve for additional relief capacity under high boost and load conditions. The SSQV is constructed of polished billet aluminum, which ensures long-term durability and visual appeal. The mounting base utilizes a circular mounting flange that provides exception flow and complete secure mounting via a C-clip snap ring and O-ring gasket. The triple-fin discharge port design produces a powerful and unique aggressive blow-off sound along with added visual distinction. For Universal SSQV applications, weld-on flanges are available in steel and aluminum for custom installation.

Can be used on Subaru Impreza WRX STi, Mitsubishi EVO VIII 8 IX 9 X 10 including MR, Toyota Supra, Honda Civic, Integra, Dodge Neon SRT-4 / SRT4, Mazda RX7 / RX-7, RX8 / RX -8, Nissan Skyline GTR / GT-R, Sylvia S13 S14 240SX, and all other turbocharged applications. (Proper mounting hardware is required. - Not included)