HKS 71008-AT018 Super SQV4 BOV Kit Toyota Mark II JZX100 JZX110 1JZ-GTE

Vehicle Fitment

• 1996/09-2000/09 Toyota Mark II / Chaser / Cresta (JZX100, 1JZ-GTE) - All variants
• 2000/10-2004/10 Toyota Mark II (JZX110, 1JZ-GTE) - Mark II only (not Verossa)
• 1999/09-2003/11 Toyota Crown (JZS171, 1JZ-GTE) - All variants
• 1999/09-2003/11 Toyota Crown Estate (JZS171W, 1JZ-GTE) - All variants

Fitment Notes

• JZX110 fitment is confirmed for the Toyota Mark II only - not compatible with the Toyota Verossa (which shares the JZX110 platform).
• JZX110 compatibility note: This kit cannot be combined with a Racing Suction or Racing Suction Reloaded intake kit on the JZX110. If running an HKS Racing Suction on a JZX110, confirm compatibility before ordering.
• Kit includes the Super SQV4 head unit, vehicle-specific aluminium pipe, hoses, clamps, and fittings - no additional parts are required for installation on the listed vehicles.
• The kit uses the same mounting flange dimensions as all previous generation HKS SSQV units - compatible with all optional HKS SSQV inserts, recirculation fittings, and recirculation kits.
• Not for sale in California or CARB-compliant states.

Features

• Super SQV4 (Sequential Blow-Off Valve, 4th generation) - HKS's flagship blow-off valve design using a unique sequential valve structure with primary and secondary valves for precise pressure management across all boost levels from low to high.
• Sequential valve structure - the primary valve opens first under lower boost conditions, with the secondary valve activating progressively as boost pressure increases. This sequential opening allows the valve to handle a broad range of boost without leaking at lower pressures or choking at higher ones.
• Differential pressure control system - the valve responds to the differential between boost pressure and intake manifold pressure, ensuring stable, reliable operation regardless of boost level or engine configuration.
• Pull-type relief design - the valve uses a pull-type (vacuum-actuated) mechanism that ensures stable seating and leak-free operation under boost, regardless of the amount of boost pressure applied.
• Clear-coated aluminium die-cast body - premium aluminium die-cast construction provides durability and a clean visual appearance in the engine bay. The body features HKS logos cast into the structure alongside a holographic HKS authentication logo for genuine product verification.
• High stiffness die-cast metal secondary valve - the secondary valve main portion is manufactured in die-cast metal for reliable long-term operation and consistent sealing performance.
• Triple fin sound design - three fins set at the centre of the funnel produce the distinctive aggressive "whoosh" sound associated with HKS SSQV valves. An optional Round Fin insert is available separately for sound tuning.
• Recirculation fitting included - the triple fin can be replaced with the included recirculation fitting to reroute discharged air back into the intake tract (recirculation hose sold separately), enabling closed-loop operation for MAF-equipped vehicles or emissions compliance.
• Compatible with all previous SSQV accessories - the SQV4 uses the same mounting flange as all previous HKS SSQV generations, maintaining full backwards compatibility with existing inserts, recirculation kits, and fittings.

Specifications

• Part Number: 71008-AT018
• Product Name: HKS Super SQV4 Kit
• Generation: 4th Generation Sequential Blow-Off Valve
• Compatible Vehicles: Toyota Mark II/Chaser/Cresta JZX100 (1JZ-GTE, 1996-2000); Toyota Mark II JZX110 (1JZ-GTE, 2000-2004); Toyota Crown JZS171 (1JZ-GTE, 1999-2003); Toyota Crown Estate JZS171W (1JZ-GTE, 1999-2003)
• Engine: 1JZ-GTE (all listed applications)
• Valve Type: Sequential (Pull-Type Relief Design)
• Body Material: Aluminium die-cast (clear coated)
• Secondary Valve Material: Die-cast metal
• CARB Legal: No - not for sale in California or CARB-compliant states
• UPC: 4957266265284

Included Components

• 1x HKS Super SQV4 head unit
• 1x Vehicle-specific aluminium pipe
• Hoses, clamps, and fittings for complete installation
• Triple fin insert (installed)
• Recirculation fitting

Product Description

The HKS 71008-AT018 is the Super SQV4 (4th generation Sequential Blow-Off Valve) kit for the Toyota 1JZ-GTE engine in JZX100 (Mark II/Chaser/Cresta), JZX110 (Mark II), JZS171 (Crown), and JZS171W (Crown Estate) chassis. The SQV4 is HKS's most advanced blow-off valve design, using a unique sequential valve structure with separate primary and secondary valves that activate progressively - the primary valve handles low-boost conditions while the secondary valve activates as boost increases, allowing the system to operate precisely and leak-free across a wide range of boost levels without the compromises of a single-valve design.

The pull-type relief mechanism ensures stable seating under boost, and the differential pressure control system responds accurately to changing boost and manifold pressure conditions. The aluminium die-cast body features a clear coat finish, cast-in HKS logos, and a holographic authentication mark for genuine product verification. The distinctive triple fin design at the funnel centre produces the SSQV's characteristic aggressive induction sound - the triple fin can be replaced with the included recirculation fitting to reroute discharged air back into the intake tract for MAF sensor compatibility. The SQV4 shares its mounting flange with all previous SSQV generations, maintaining full accessory compatibility. JZX110 note: not compatible with Racing Suction or Racing Suction Reloaded on that platform.