What is a blow-off valve and why would I need one?

A blow-off valve (BOV) releases excess boost pressure from a turbocharged engine when the throttle is closed suddenly. This helps protect the turbo from damage caused by compressor surge and can improve throttle response when you accelerate again.

Is this a direct bolt-on part for any car?

No, the HKS SUPER SQV4 is a universal assembly. It is designed to be adapted to various turbocharged vehicles, but it requires custom fabrication for mounting and plumbing to connect to your turbo system and a vacuum source.

What does 'Not CARB approved' mean?

CARB (California Air Resources Board) approval means a part meets specific emissions standards for use in California. Since this part is not CARB approved, it cannot be legally installed on a vehicle registered in California.

HKS SUPER SQV4 Blow Off Valve 71008-AK005

Name: HKS SUPER SQV4 BLACK EDITION UNIVERSAL ASSY
Brand: HKS
SKU: hks-hks-super-sqv4-black-edition-universal-assy-t14-313455
Price: 340.60 USD
Availability: InStock

HKS SUPER SQV4 BLACK EDITION UNIVERSAL ASSY

$340.60

In Stock

HKS SUPER SQV4 Black Edition Universal Blow Off Valve. Known for performance tuning, this valve offers improved turbo response.

Key Features

Universal fitment for a wide range of turbocharged vehicles.
Features HKS's unique sequential valve structure for reliable operation.
Differential pressure controlled system helps manage turbo boost.
Black Edition finish offers a stealthy aesthetic.
Helps reduce compressor surge and can improve turbo response.
Not CARB approved; cannot ship to California.

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Product Details

HKS is well-known for making performance parts that help turbo-charged vehicles run better. The SUPER SQV4 Black Edition is a universal blow-off valve assembly designed to help your turbocharger system work more efficiently. It's built to help reduce compressor surge, which can happen when the throttle closes suddenly while the turbo is still spinning fast. By releasing that excess pressure, the SQV4 helps protect your turbo and can lead to quicker response when you get back on the gas.

This version features a unique sequential valve structure that HKS developed. It uses a differential pressure controlled system, meaning it opens and closes based on the pressure difference across the valve. This design helps ensure it opens reliably under boost and closes tightly when it shouldn't. The Black Edition comes with a distinctive black finish for a stealthy look under the hood. Because it's a universal part, you'll need to figure out the plumbing and mounting for your specific setup, which often involves custom piping and a vacuum source.

Keep in mind that this part is not CARB approved and cannot be shipped to California. If you're looking to tune a turbocharged vehicle and want a well-built blow-off valve with a reputation for performance, the HKS SUPER SQV4 is a solid option.