What is the main function of a blow-off valve (BOV)?

A blow-off valve releases excess boost pressure from the intake system when the throttle is closed suddenly, such as during gear changes. This protects the turbocharger from damage caused by compressor surge and can lead to improved throttle response.

Why is this kit specific to JDM S14 SR20DET models?

The kit is designed with specific mounting points and plumbing to directly fit the JDM S14 chassis and the SR20DET engine's turbo system. This ensures proper installation and function without requiring custom modifications.

What does 'Not CARB approved' mean for this product?

CARB (California Air Resources Board) approval means a part meets strict emissions standards for use in California. Since this kit is not CARB approved, it cannot be legally sold or shipped to California residents.

HKS SSQV4 BOV Kit 71008-AN015

Name: HKS 93-98 S14 JDM Specific SR20DET Only SSQV4 BOV Kit
Brand: HKS
SKU: hks-hks-93-98-s14-jdm-specific-sr20det-only-ssqv4-bov-kit-t14-246065
Price: 456.05 USD
Availability: BackOrder

HKS 93-98 S14 JDM Specific SR20DET Only SSQV4 BOV Kit

$456.05

On Backorder — Expected to ship by Jun 19, 2026

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

HKS 93-98 S14 JDM Specific SR20DET Only SSQV4 BOV Kit

Key Features

Fits 1993-1998 JDM S14 models with SR20DET engine.
HKS SSQV4 Blow Off Valve kit releases excess boost pressure.
Unique recirculating design helps prevent compressor surge.
Features a newly developed diaphragm and seating valve for a strong seal.
Die-cast aluminum body is lightweight and strong.
Includes all necessary components for installation.

This kit is specifically designed for 1993-1998 JDM S14 models equipped with the SR20DET engine. It is not compatible with other vehicles or engine types.

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Product Details

HKS is well-known for making performance parts for Japanese domestic market vehicles, and this SSQV4 Blow Off Valve kit is a prime example. This kit is specifically designed for the 1993-1998 JDM S14 models equipped with the SR20DET engine. A blow-off valve, or BOV, is crucial for turbocharged engines as it releases excess boost pressure when you lift off the throttle, protecting your turbocharger from damage and improving throttle response.

The SSQV4 uses a unique recirculating design that helps prevent compressor surge, which can happen when the throttle closes suddenly and the boost has nowhere to go. This version features a newly developed diaphragm and seating valve that work together to ensure a strong seal and improved durability. The body is made from die-cast aluminum, making it lightweight yet strong. This kit includes everything needed for installation, ensuring a direct fit for the intended application.

Please note that this kit is not CARB approved and cannot be shipped to California. It's a popular choice for SR20DET owners looking to maintain or improve their turbo system's health and performance.