pull-type sequential valve structure and a differential pressure control system. This advanced
system allowed for a broad operation range from low to high boost. This pull-type relief
design ensures stable operation regardless of boost pressure.
Super SQV 4 features include a nickel-plated, die-cast metal secondary valve, which is
waged to the primary valve, a stainless steel C-Clip and spring to increase sealing and
durability. To assure buyers that they are purchasing an authentic HKS product, the new
design incorporates a holographic HKS logo on the back of the valve, as well as additional
HKS logos cast onto the body structure.