What is the main benefit of a recirculating blow-off valve kit like this?

A recirculating blow-off valve kit, like the HKS SUPER SQV4 Return Kit, sends vented boost pressure back into the intake system. This helps maintain the correct air-fuel ratio, preventing potential engine issues such as stalling or rough idling that can occur with vent-to-atmosphere valves.

What is the construction of the HKS SUPER SQV4 valve?

The HKS SUPER SQV4 valve itself is constructed from machined aluminum. This material choice contributes to its durability and provides a clean, high-quality appearance in the engine bay.

Can this kit be installed on any turbocharged car?

This is a universal kit designed for turbocharged applications that require a recirculating blow-off valve. While it's generally a bolt-on installation for compatible vehicles, specific mounting locations and plumbing will vary by car model. Always refer to the manufacturer's installation guide for detailed fitment information.

HKS SUPER SQV4 Blow Off Valve Kit 71008-AH012V

Name: HKS SUPER SQV4 RETURN KIT PLUS FL5
Brand: HKS
SKU: hks-hks-super-sqv4-return-kit-plus-fl5-t14-872204
Price: 524.80 USD
Availability: BackOrder

HKS SUPER SQV4 RETURN KIT PLUS FL5

$524.80

On Backorder — Expected to ship by Jun 3, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

HKS SUPER SQV4 Blow Off Valve Return Kit Plus FL5.

Key Features

Fits turbocharged vehicles requiring a recirculating blow-off valve.
HKS SUPER SQV4 valve with sequential valve structure and dual spring system.
Machined aluminum body for durability and appearance.
Return kit integrates the valve with the intake system for proper air-fuel ratio.
Helps prevent engine stalling and rough idling associated with vent-to-atmosphere valves.
Part number 71008-AH012V.

This is a universal kit designed for turbocharged vehicles requiring a recirculating blow-off valve. Specific vehicle fitment should be confirmed with manufacturer documentation.

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Product Details

This is the HKS SUPER SQV4 Blow Off Valve Return Kit Plus FL5, part number 71008-AH012V. It's designed to work with turbocharged vehicles, specifically for applications where you need to recirculate the vented air back into the intake system. The SUPER SQV (Super Sequential Valve) is a popular choice for enthusiasts looking to upgrade their factory blow-off valve. This kit includes the necessary components to integrate the SQV4 valve with a return system, which helps to prevent issues like engine stalling or rough idling that can sometimes occur with vent-to-atmosphere blow-off valves.

The SUPER SQV4 features a unique sequential valve structure and a dual spring system. This advanced design allows for a high-pressure seal at low boost, while also preventing valve flutter at high boost. The body is constructed from machined aluminum for durability and a clean look under the hood. The return kit aspect is crucial for many modern vehicles, as it ensures that the metered air is sent back into the intake stream, maintaining the air-fuel ratio and preventing check engine lights or performance issues. This makes it a more integrated and often smoother-operating solution compared to a simple vent-to-atmosphere valve.

When installing this kit, you'll be replacing your factory bypass valve with the HKS SUPER SQV4 and connecting it to the provided return piping. This setup is generally a bolt-on affair for compatible vehicles, though specific installation steps can vary. It's important to note that this kit is not CARB approved and cannot be shipped to California. If you're looking for a well-built blow-off valve solution that offers excellent performance and a reliable return system, this HKS kit is a solid option.