Description

HKS SQV4 Blow Off Valve Kit for Mitsubishi Evo 7/8/9

Firstly, Buy HKS SQV4 Blow Off Valve Kit Evo 7 8 9 online. The HKS SQV4 Blow Off Valve Kit Evo 7 8 9 is a performance-focused turbo system upgrade designed for Mitsubishi Lancer Evolution enthusiasts who want improved boost pressure management and the distinctive sound associated with the HKS Super Sequential Blow-Off Valve. With HKS part number 71008-AM011, this SQV4 kit is designed around the turbocharged Mitsubishi Evolution platform and provides an aftermarket alternative to the factory blow-off valve system.

The Mitsubishi Evolution 7, 8, and 9 are legendary turbocharged performance cars built around the 4G63T engine. As boost levels and turbocharger performance increase, proper management of pressurized intake air becomes increasingly important. The HKS SQV4 is engineered to release excess boost pressure when the throttle closes, helping manage pressure within the turbocharger and intake system during rapid throttle transitions.

For Evo owners building a performance-oriented street car, weekend vehicle, or more extensively modified turbo setup, the SQV4 provides both functional turbo-system hardware and the unmistakable HKS blow-off valve character.

HKS SQV4 Blow Off Valve Kit Evo 7 8 9

The HKS Super SQV4 is the latest evolution of HKS’s well-known Super Sequential Blow-Off Valve design. Rather than simply focusing on sound, the SQV4 is designed to provide controlled pressure relief when the throttle closes after boost has been generated.

During acceleration, the turbocharger compresses air and forces it toward the engine. When the driver suddenly lifts off the throttle, the throttle plate closes while the turbocharger is still producing pressure. The blow-off valve provides a path for managing that excess pressure.

This helps reduce unwanted pressure behavior in the intake tract and can support smoother transitions between acceleration and throttle lift-off.

Key Features

• HKS Super SQV4 blow-off valve
• HKS part number 71008-AM011
• Designed for Mitsubishi Lancer Evolution 7, 8 and 9 applications
• Performance-oriented turbo system upgrade
• Helps manage excess boost pressure during throttle closure
• Distinctive HKS SQV blow-off valve sound
• Suitable for modified and performance-focused Evo builds
• Ideal for street, track, and enthusiast applications
• Designed as part of the HKS turbo performance range

Why Upgrade to an HKS SQV4?

The factory blow-off valve can be adequate for a stock Evo, but enthusiasts often upgrade turbo-system components as part of a broader performance build.

Firstly, the HKS SQV4 offers a performance-oriented alternative to the factory valve. Secondly, its Super Sequential design is intended to provide controlled pressure release across different boost and airflow conditions. Thirdly, the SQV4 gives the engine bay and turbo system the recognizable HKS appearance and sound that many Mitsubishi enthusiasts associate with high-performance builds.

For an Evo 7, Evo 8, or Evo 9 equipped with an upgraded turbocharger, intake system, or other performance hardware, a quality blow-off valve can be an important part of the overall turbo setup.

However, the correct valve configuration should always match the vehicle’s turbocharger, intake arrangement, engine management, and tuning strategy.

Designed for Mitsubishi Evo 7, 8 and 9

The Mitsubishi Evolution 7, 8, and 9 share the legendary 4G63T turbocharged engine platform, making them particularly popular with enthusiasts who modify their turbo systems.

The HKS SQV4 Blow Off Valve Kit is designed for this generation of Mitsubishi Evolution applications and is intended for owners looking to upgrade the factory-style boost pressure management system.

Whether you’re refreshing an older Evo 7, upgrading an Evo 8, or completing a performance build on an Evo 9, the SQV4 can complement a larger turbo-system upgrade package.

Because individual Evo vehicles can differ depending on model year, market, turbocharger, intake configuration, and previous modifications, always verify the exact kit application before installation.

How a Blow-Off Valve Works

A blow-off valve operates primarily during throttle lift-off.

When the throttle is open and the turbocharger is generating boost, compressed air travels through the intake system toward the engine. When the driver releases the accelerator, the throttle closes rapidly.

The turbocharger can continue spinning and generating pressure even though airflow into the engine has suddenly decreased. The blow-off valve responds by opening and managing the excess pressure.

This process helps protect the turbocharger system from undesirable pressure conditions and allows the turbo system to transition between boost and closed-throttle conditions.

The HKS SQV4’s sequential valve design is intended to provide controlled operation across different pressure conditions.

Performance Benefits

Improved Boost Pressure Management

The SQV4 provides a dedicated mechanism for managing excess intake pressure during throttle closure.

Performance Build Compatibility

It can complement modified Evo 7, 8, and 9 turbo systems when correctly matched to the vehicle’s configuration.

Recognizable HKS Sound

The Super SQV4 is known for its distinctive blow-off valve sound, making it a popular choice among Mitsubishi Evolution enthusiasts.

Quality Performance Hardware

HKS has a long history of developing turbocharging and performance components for Japanese performance vehicles.

Ideal for Evo Enthusiasts

The SQV4 can be an excellent addition to a performance-focused engine bay where both function and recognizable aftermarket hardware are important.

Recirculating vs. Atmospheric Operation

One important consideration when upgrading a blow-off valve is how discharged air is handled.

Depending on the vehicle’s intake and engine-management configuration, changing from the factory air-management arrangement to an atmospheric blow-off valve can influence drivability or fueling behavior on some MAF-based systems.

Therefore, installation should take the entire intake and engine-management setup into account. If the vehicle is heavily modified or tuned, consulting an experienced Mitsubishi Evo tuner can help ensure the blow-off valve configuration is appropriate.

Installation Considerations

Before installing the HKS SQV4, inspect the vehicle’s existing vacuum lines, intake piping, mounting location, and surrounding turbo components.

Installation should be completed using the appropriate HKS instructions for the specific application. Make sure all connections are secure and properly sealed.

After installation, inspect the system for leaks and verify normal idle and boost behavior. If the Evo has aftermarket engine management or extensive turbo modifications, additional tuning considerations may apply.

Professional installation is recommended if you are unfamiliar with turbocharger or boost-control systems.

HKS SQV4 for Evo 7/8/9 Builds

The HKS SQV4 Blow Off Valve Kit Evo 7 8 9 is especially relevant to enthusiasts who are building their Mitsubishi Evolution around upgraded turbo hardware.

A blow-off valve should be considered as part of the complete turbo system rather than as an isolated modification. Turbocharger selection, intercooler piping, intake design, engine management, boost control, and tuning all influence how the system operates.

For this reason, the SQV4 can be a useful component within a larger performance strategy, particularly when the vehicle is being upgraded beyond the original factory configuration.

Buy HKS Evo Parts Online

If you’re upgrading a Mitsubishi Evolution 7, 8, or 9, choosing quality turbo-system components can make a significant difference to the overall build. The HKS SQV4 combines recognizable HKS design with a purpose-built blow-off valve system for enthusiasts seeking an aftermarket solution.

At Evomotorparts.com, you can shop Mitsubishi Evo OEM and performance parts covering turbochargers, blow-off valves, intercooler systems, exhaust components, engine parts, drivetrain upgrades, suspension, and more.

Whether you’re building a responsive street Evo or developing a more serious 4G63T performance setup, selecting components that work together is essential.

Frequently Asked Questions

What is the HKS SQV4 part number?

The part number for this HKS SQV4 Blow Off Valve Kit is 71008-AM011.

What Evo models is this kit for?

This listing is for Mitsubishi Lancer Evolution 7, Evolution 8, and Evolution 9 applications.

What engine do Evo 7, 8 and 9 use?

These Evolution generations are associated with Mitsubishi’s legendary 4G63T turbocharged engine platform, although exact specifications and configurations can vary by market and model.

Does the HKS SQV4 increase horsepower?

A blow-off valve’s primary purpose is managing excess boost pressure during throttle closure. Installing one should not be viewed as a guaranteed horsepower increase by itself.

Does the HKS SQV4 make a blow-off valve sound?

Yes. The Super SQV series is well known for its distinctive blow-off valve sound during throttle lift-off.

Can I install it on a modified Evo?

Potentially, but compatibility depends on the turbocharger, intake system, engine management, and existing modifications. Verify the application before installation.

Is this suitable for an Evo 7, 8 or 9 street car?

It can be used as part of a performance-oriented street build when correctly matched to the vehicle’s configuration and tuning strategy.

Final Thoughts

The HKS SQV4 Blow Off Valve Kit 71008-AM011 is a performance-focused turbo system upgrade for Mitsubishi Evolution 7, 8, and 9 enthusiasts looking to improve boost pressure management while adding the distinctive HKS SQV4 character to their 4G63T build.

Shop Evomotorparts today to buy the HKS SQV4 Blow Off Valve Kit Evo 7 8 9 and explore more HKS, OEM, and performance Mitsubishi Evolution parts for your build.