HKS Blow Off Valve Kit

Universal Fitment

Part #: 71008-AF012

Overview

The HKS SSQV4 Blow Off Valve Kit is a high-performance, dual-stage pull-type relief valve designed for turbocharged Subaru WRX (08-14) and Legacy 2.5 GT (05-06) models. Crafted for enthusiasts seeking reliable boost control and quick response, this BOV helps maintain optimal pressure levels while preventing leaks under any boost condition. Its innovative design ensures a crisp, responsive sound and consistent operation, making it an ideal upgrade for those looking to enhance their vehicle’s turbo system performance and reliability. Whether you're aiming for improved response or a more aggressive sound, this kit provides a durable and effective solution tailored for your Subaru. Designed with precision engineering, the SSQV4 features a unique dual-stage mechanism that eliminates boost leaks and maintains complete closure during idle, ensuring smooth operation and consistent performance. Its robust construction and high-quality materials guarantee long-lasting durability, even under demanding driving conditions. This BOV is suitable for both street and performance applications, offering a significant upgrade over factory or push-type valves.

Key Features

This blow off valve kit combines innovative design with practical benefits to enhance your turbocharged vehicle’s performance and sound. Key features include:

• Dual-stage pull-type relief valve for leak-free operation under all boost levels
• Quick valve response for improved throttle feel and turbo response
• Precise control of boost pressure, reducing compressor surge and protecting your turbo
• High-quality aluminum construction with durable coatings for long-lasting performance
• Designed for easy installation with compatible Subaru WRX and Legacy models
• Distinctive, aggressive sound during boost release for a sporty driving experience
• Eliminates the need for spring load adjustments, ensuring consistent operation across different vehicles

Construction & Design

The SSQV4 features a precision-machined aluminum body with a durable, corrosion-resistant finish. Its dual-stage mechanism is engineered for reliable boost control, with a focus on minimizing leaks and ensuring rapid response. The compact, lightweight design integrates seamlessly with your vehicle’s turbo system, providing a clean and professional appearance.

Driving Feel & Feedback

This blow off valve enhances the driving experience by delivering a crisp, audible release during throttle lift, adding an engaging sound that complements the turbocharged engine’s character. Its quick response helps improve throttle response and reduces compressor surge, contributing to smoother acceleration and more predictable boost behavior.

Installation & Fitment

Installation is straightforward for those familiar with turbo system upgrades. The kit includes all necessary hardware and fittings for a secure, leak-free connection. Fitment should be verified against your vehicle’s specifications to ensure compatibility.

What’s Included

The package includes the SSQV4 blow off valve, mounting hardware, and necessary fittings for a complete upgrade.