HKS 71008-AT021 Super SQV4 Blow Off Valve Kit for 2020-2026 Toyota GR Supra

Vehicle Fitment

• 2020-2026 Toyota GR Supra (A90/A91 Platforms, 3.0L I6 Turbo B58)

Features

• Super Sequential Blow Off Valve (SSQV4) specifically for GR Supra
• Produces authentic turbo blow-off sound even on Valvetronic engines
• Dual-stage venting for responsive boost pressure relief
• Aluminum body with upgraded charge pipe for reduced airflow resistance
• Compatible with stock and HKS intake systems
• Enhances throttle response and turbo system efficiency
• Vented or recirculated installation options available
• Direct-fit kit with vehicle-specific components

Specifications

• Part Number: 71008-AT021
• Product Type: Super SQV4 Blow Off Valve Kit
• Material: High-grade aluminum body and components
• Applicable Engine: 3.0L I6 Turbo B58
• Fitment Years: 2020-2026 Toyota GR Supra
• Vent Options: Atmosphere or recirculation with adapter
• Installation: Vehicle-specific charge pipe and flange

Included Components

• 1x HKS Super SQV4 blow off valve assembly
• 1x Vehicle-specific mounting flange
• 1x Suction return / recirculation adapter (kit dependent)
• 1x O-ring and C-clip hardware set
• Assorted bolts, nuts, and seals for installation

Product Description

The HKS 71008-AT021 Super SQV4 Blow Off Valve Kit is engineered specifically for the Toyota GR Supra equipped with the turbocharged 3.0L B58 engine (model years 2020-2026). Unlike traditional blow off valves, the sequential SSQV4 design uses a dual-stage venting mechanism that ensures smooth and responsive boost pressure relief under a wide range of operating conditions. This design not only improves boost management but also produces a distinctive and aggressive blow-off sound - an auditory enhancement many Supra enthusiasts seek.

Constructed from durable aluminum and including vehicle-specific charge pipe components, the kit reduces airflow resistance compared to stock parts and integrates seamlessly with the Supra's intake setup. The Super SQV4 kit can be installed in either atmospheric venting or recirculated configuration (with appropriate adapter) depending on your preferences and local emissions requirements. Designed as a direct replacement for the factory bypass system, the 71008-AT021 improves throttle response, decreases compressor surge, and delivers both performance and sound upgrades with a clean installation.