HKS Racing SQV Universal Blow Off Valve - 71008-AK004

HKS Racing SQV universal blow off valve, part 71008-AK004.

• 51 mm large valve for high-power and large-displacement engines
• Adjustable pre-load
• 3-chamber reliefless system, intended to operate stably at all boost levels without a separate spring setting for each vehicle
• Tested over 1 million operations
• Valve stays closed under boost; on throttle lift a pressure difference between chambers A and B opens the valve to vent air, and a spring closes it as the difference equalizes
• Installation flange included; it must be welded to a pipe
• Piping hose not included
• Flange size differs from the one used on the existing SSQV

HKS valve operation diagrams:

HKS resources:

• Installation instructions (PDF, HKS Japan)

Stocked and shipped from Calgary by Boost Factory.

Contact us if you are unsure of fitment or Size HERE