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Product Details
| Part Number: | 71008-AH011 |
| Brand: | HKS |
Give your turbocharged Civic the unmistakable sound and proven pressure-control technology of the HKS Super SQV IV Blow-Off Valve Kit, Part #71008-AH011. Designed specifically for 10th-generation Honda Civic 1.5L Turbo applications, this vehicle-specific kit combines HKS's famous Super Sequential Blow-Off Valve with the piping, brackets, hoses, and installation hardware needed for a clean bolt-on installation.
Unlike the 71008-AH010 Return Kit Plus, part number 71008-AH011 does not include the suction-return/recirculation kit. This allows the SSQV IV to discharge excess boost pressure to the atmosphere, delivering the sharp, distinctive HKS blow-off sound enthusiasts associate with the Super SQV. HKS confirms AH011 as the version without the suction return kit.
At the heart of the system is HKS's unique sequential dual-valve structure and differential-pressure control system. The pull-type relief design provides stable operation across a broad range of boost pressures, making the valve suitable for everything from stock turbo setups to modified applications without the spring adjustments commonly required by conventional push-type blow-off valves.
Features
- Genuine HKS Super SQV IV vehicle-specific blow-off valve kit
- Designed for 10th-generation Honda Civic 1.5L Turbo applications
- HKS part number 71008-AH011
- Designed for L15-series turbocharged engines, including applicable U.S.-market L15B7 models
- Atmospheric-discharge configuration for maximum HKS SSQV sound
- Does not include the suction-return/recirculation kit
- Produces HKS's distinctive sharp, high-frequency blow-off sound
- Unique sequential dual-valve design
- Primary valve responds quickly to initial pressure changes
- Secondary valve provides additional discharge capacity as boost pressure increases
- Differential-pressure control system provides precise valve operation
- Wide operating range from low boost to high boost
- HKS pull-type relief valve design
- Pull-type operation helps prevent boost leakage under high-pressure conditions
- Does not require conventional blow-off valve spring preload adjustment
- Helps quickly relieve excess charge pressure when the throttle closes
- Helps control pressure buildup between the turbocharger and closed throttle
- Suitable for stock and modified turbocharger setups
- High-quality silver aluminum die-cast valve body
- High-stiffness die-cast metal secondary valve
- HKS Triple Fin outlet design creates the signature Super SQV sound
- Optional HKS replacement fins can be used to alter blow-off sound
- Vehicle-specific piping provides a cleaner installation than adapting a universal blow-off valve
- Includes application-specific mounting brackets, hoses, clamps and installation hardware
- Compatible with manual and CVT transmissions on specified applications
- Highly visible engine-bay installation adds a performance appearance
- Genuine HKS performance product
HKS Sequential Dual-Valve Technology
- The Super SQV IV differs substantially from a conventional single-valve blow-off valve. HKS uses a two-stage sequential design consisting of a smaller primary valve and larger secondary valve.
- During lower-pressure conditions, the primary valve responds quickly to release the initial excess pressure. As pressure increases, the secondary valve also operates, providing additional airflow capacity. This sequential arrangement allows the SSQV IV to respond effectively across a wide range of boost conditions.
- Combined with HKS's differential-pressure control system, the design provides consistent blow-off operation whether the vehicle is running relatively low factory boost or has been modified for increased boost pressure.
Pull-Type Relief Valve Design
- Another major feature of the HKS SSQV is its pull-type valve mechanism.
- Traditional push-type blow-off valves generally depend heavily on spring preload. Too little spring pressure can allow the valve to leak under boost, while excessive spring pressure can prevent the valve from responding properly at lower boost levels.
- HKS's pull-type design instead uses pressure differential to control operation. HKS states that this arrangement provides stable operation regardless of boost pressure and allows the SSQV IV to work over a wide range without the spring-setting adjustments required by many conventional valves.
Signature HKS Super SQV Sound
- One of the primary reasons enthusiasts choose the 71008-AH011 is sound.
- HKS equips the SSQV IV with its recognizable Triple Fin outlet, which produces the sharp, high-frequency discharge sound associated with the Super Sequential Blow-Off Valve. HKS specifically notes that the factory recirculation valve is extremely quiet by comparison, while the SSQV IV makes valve operation clearly audible.
- Because AH011 does not include the suction-return kit, discharged air is vented atmospherically rather than being routed back into the intake, maximizing the characteristic SSQV sound.
Vehicle Fitment
For the U.S. market, HKS USA currently catalogs 71008-AH011 for multiple 10th-generation Civic 1.5T configurations, including 2016–2020 Civic Coupe, 2016–2021 Civic Sedan, 2017–2021 Civic Hatchback, and 2017–2020 Civic Si Coupe/Sedan, depending on the exact model and body style. HKS USA identifies these applications with the L15B7 engine.
The Japanese HKS application chart is more restrictive, listing FC1/FK7 L15B/L15C applications from September 2017 through December 2019 and noting that its application is not compatible with post-2020 models.
- 2016–2021 Honda Civic 1.5T – select models
- 2017–2020 Honda Civic Si 1.5T
- Engine: L15B7 1.5L Turbo
- Chassis: FC1 / FC3 / FK7, depending on body style
- Transmission: Manual or CVT on applicable models
Product Specifications
- Manufacturer: HKS
- Part Number: 71008-AH011
- Product: Super SQV IV Vehicle-Specific Kit
- Product Type: Blow-Off Valve Kit
- Valve: Super Sequential Blow-Off Valve IV
- Valve Color: Silver
- Valve Operation: Pull-Type
- Valve Structure: Sequential Dual Valve
- Control System: Differential Pressure
- Outlet: HKS Triple Fin
- Discharge Configuration: Atmospheric
- Suction Return Kit: Not Included
- Engine Application: Honda L15-series 1.5L Turbo
- U.S. Engine Application: L15B7
- Transmission Compatibility: MT / CVT on applicable vehicles
Complete Vehicle-Specific Installation Kit
- Rather than requiring owners to adapt a universal SSQV to the factory charge piping, 71008-AH011 is a complete vehicle-specific kit. HKS's installation documentation identifies it specifically as a Super SQV IV Kit for the Civic FC1, FK7 and FC3 configurations.
- The kit incorporates the application-specific SSQV piping and mounting arrangement along with the hoses, clamps, brackets and associated hardware required to integrate the valve into the Civic's turbocharged intake system. This provides a much cleaner installation than fabricating a flange or charge pipe for a universal blow-off valve.
AH011 vs. AH010
The key difference between these two closely related HKS part numbers is the suction-return configuration.
- 71008-AH011 – Super SQV IV: Does not include the suction-return kit and is intended for the more audible atmospheric SSQV configuration.
- 71008-AH010 – Super SQV IV Return Kit Plus: Includes the components necessary for the suction-return/recirculating configuration.
Installation Note
- Proper installation and routing of the pressure-reference hoses are important for correct SSQV operation. HKS recommends professional installation and instructs installers to follow the supplied manual and applicable factory service procedures.
The HKS 71008-AH011 Super SQV IV Blow-Off Valve Kit is an excellent upgrade for 10th-generation Civic 1.5T owners looking for HKS's signature blow-off sound, sequential dual-valve technology, pull-type pressure control, vehicle-specific fitment, and a complete bolt-on installation package.
Due to the manufacturer's price control policy, this item may be excluded from promotions and discounts
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
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