HKS Blow Off Valve

Fitment: Subaru Impreza WRX STI (08-14) / VAB (15+)

Part #: 71008-KF013VB

Overview

The HKS SSQV4 Blow Off Valve with Recirculation is a high-performance aftermarket component designed for turbocharged Subaru Impreza WRX STI models from 2008 to 2014 and VAB models from 2015 onward. This advanced blow-off valve features a unique sequential valve structure combined with a differential pressure control system, enabling it to operate efficiently across a broad range of boost pressures. Its design ensures stable and consistent venting of excess pressure, which helps maintain optimal turbocharger response and reliability. Ideal for enthusiasts seeking improved throttle response, enhanced sound, and a more refined boost control, this BOV is engineered to support the demands of high-performance turbocharged engines while maintaining smooth operation during daily driving or spirited driving sessions. Whether you are upgrading your vehicle for increased performance or seeking a more aggressive sound, the HKS SSQV4 offers a reliable solution that balances functionality with durability. Its recirculation feature ensures compatibility with stock intake systems, preventing issues such as rough idling or check engine lights, making it suitable for both street use and track days.

Key Features

The HKS SSQV4 Blow Off Valve is designed with precision and performance in mind, offering several key benefits:

• Sequential valve design for smooth and responsive venting
• Differential pressure control system for consistent operation across boost levels
• Pull-Type relief mechanism for stable pressure release
• Recirculation capability to maintain factory-like drivability
• High-quality aluminum construction for durability and heat resistance
• Compact, lightweight design for easy installation
• Supports a broad range of boost pressures for versatile tuning

Construction & Design

Constructed from durable aluminum with a precision-machined internal valve mechanism, the HKS SSQV4 is engineered to withstand high boost pressures and harsh operating conditions. Its compact design allows for easy installation in a variety of turbo setups, while the recirculation port ensures seamless integration with stock intake systems, maintaining optimal airflow and preventing compressor surge.

Driving Feel & Feedback

This blow-off valve enhances the vehicle's response by providing a crisp, audible release of excess pressure, which not only improves throttle feel but also delivers an engaging driving experience. Its stable operation ensures consistent venting, contributing to smoother acceleration and deceleration, especially during high boost conditions.

Installation & Fitment

Installation requires basic mechanical skills and should be performed following the manufacturer's instructions. The unit is designed as a direct bolt-on replacement for the stock BOV, with no need for additional modifications in most cases. Fitment should be verified against the vehicle's specifications and the part number provided.

What’s Included

The package includes the HKS SSQV4 Blow Off Valve with recirculation fitting, mounting hardware, and installation instructions, ensuring a straightforward upgrade process.