What is the primary function of a blow-off valve like the HKS Super SQV?

A blow-off valve releases excess boost pressure from the intake system when you close the throttle. This prevents compressor surge, which can damage your turbocharger, and helps maintain turbo efficiency.

What does the '4+RETURN KIT' designation mean for this HKS valve?

The '4+RETURN KIT' signifies that this specific model includes all the necessary parts to recirculate the vented boost pressure back into the intake tract. This can help maintain air-fuel ratios and reduce noise compared to a vent-to-atmosphere valve.

Are there any special considerations for installing this kit on a JZA80 or JZS161?

Installation requires tapping into the boost piping and a vacuum source. It's important to ensure all connections are airtight to prevent boost leaks and that the vacuum line is routed correctly for proper valve operation. Refer to the manufacturer's instructions for detailed guidance.

HKS Super SQV 4+RETURN KIT Turbo Blow Off Valve 71008-AT012V

Name: HKS Super SQV 4+RETURN KIT JZA80/JZS161
Brand: HKS
SKU: hks-hks-super-sqv-4-return-kit-jza80-jzs161-t14-113918
Price: 531.10 USD
Availability: BackOrder

HKS Super SQV 4+RETURN KIT JZA80/JZS161

$531.10

On Backorder

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

HKS Super SQV 4+RETURN KIT for JZA80/JZS161.

Key Features

Fits JZA80 (Toyota Supra) and JZS161 (Lexus GS300/GS400/GS430).
HKS Super Sequential Valve (SQV) technology for rapid response.
Differential pressure control system for precise operation.
Includes components for a recirculating blow-off valve setup.
Helps protect the turbocharger from compressor surge.
Improves throttle response by managing excess boost pressure.

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Product Details

This is the HKS Super SQV 4+RETURN KIT, specifically designed for the JZA80 (Toyota Supra) and JZS161 (Lexus GS300/GS400/GS430) platforms. It's a blow-off valve system that manages the excess boost pressure created by your turbocharger, preventing compressor surge and helping to maintain the turbo's efficiency. When you lift off the throttle, the excess boost needs somewhere to go; this valve safely vents it, protecting your turbo and improving throttle response.

The Super SQV (Super Sequential Valve) design uses a unique, patented sequential valve structure and differential pressure control system. This means it opens and closes based on the pressure difference, allowing for a very rapid response and a solid seal against boost leaks. The '4+RETURN KIT' designation indicates that this particular kit includes the necessary components to recirculate the vented air back into the intake system, which is often preferred for maintaining proper air-fuel ratios and reducing noise. The kit is well-made with durable materials, ensuring it can handle the high pressures and temperatures found in forced induction systems. Installation involves tapping into the boost piping and connecting to a vacuum source, and while it requires some mechanical aptitude, it's a direct fit for the intended applications.

When installing this kit, pay close attention to the vacuum line routing and ensure all connections are secure to prevent boost leaks. The recirculating design helps keep your engine running smoothly and can be a requirement in some emissions-controlled areas. This kit is a popular choice for enthusiasts looking to fine-tune their turbocharged vehicle's performance and protect their investment.