HKS Super SQV4 Blow Off Valve Kit - Toyota GR Supra (A90/A91)

OVERVIEW

The HKS Super SQV4 (SSQV IV) is a vehicle-specific blow off valve kit engineered for the Toyota GR Supra 3.0 (A90/A91, B58). It uses HKS's proven pull-type sequential valve mechanism with differential pressure control for crisp, reliable relief across the full boost range — from light throttle to high boost — while delivering the signature high-frequency SSQV blow off sound. The kit includes an aluminum charge pipe adapter/flange that replaces the factory resin component for a direct, factory-like fit. It is offered in a vent-to-atmosphere configuration as well as recirculation (suction return) configurations that route vented air back into the intake to keep the MAF metering intact.

SPECS

• Model: HKS Super SQV4 / SSQV IV (Silver)
• Type: Pull-type sequential blow off valve with differential pressure (diaphragm) control
• Operation: Progressive relief from low to high boost for smooth, consistent response
• Construction: Billet aluminum valve body with aluminum charge-pipe flange (replaces factory resin piece)
• Sound: High-frequency SSQV blow off tone (atmospheric config)
• Configurations: Vent to atmosphere / recirculate to OEM intake / recirculate to HKS Carbon Racing Suction intake

PARTS INCLUDED

• HKS Super SQV4 blow off valve unit
• Vehicle-specific aluminum flange/adapter for the intercooler piping
• Suction return hose and fittings (recirculation configurations only)
• Vacuum line, filter, T-fittings, hose clamps, circlip and zip ties
• Mounting hardware and installation manual

TECH RESOURCES

• Required extra (Recirculated to HKS Carbon Racing Suction configuration only): the HKS Carbon Racing Suction intake is required and is sold separately — this return-kit configuration routes vented air back into the HKS intake and will not fit the factory airbox.
• The "Recirculated to OEM intake" configuration is designed for the factory (stock) airbox — no aftermarket intake required.
• The "Vented to atmosphere" configuration exhausts to open air and produces the loudest SSQV sound; recirculation configurations are quieter and keep vented air within the metered intake.
• Installation replaces the factory recirculation/diverter valve on the charge piping; retain factory routing references and torque fittings per the included HKS manual.
• After install, verify all hose clamps and the vacuum line connection are secure and leak-free before boosted driving.

PART NUMBER

• 71008-AT021 — Vented to atmosphere
• 71008-AT021V — Recirculated to OEM intake
• 71008-AT022V — Recirculated to HKS Carbon Racing Suction intake

VEHICLE APPLICATIONS