Upgrading the exhaust system on your Subaru WRX is one of the most effective ways to enhance both performance and auditory appeal. Among the various options, turbo back exhaust systems stand out as comprehensive upgrades that replace the entire exhaust flow path from the turbocharger to the tailpipe. This upgrade not only optimizes exhaust flow but also significantly improves horsepower, torque, and the overall driving experience. However, with a wide variety of turbo back exhausts available on the market, selecting the right one can be overwhelming. This article offers an in-depth exploration and video analysis of the top-rated turbo back exhaust systems for the Subaru WRX, providing crucial insights to help you make an informed choice tailored to your driving style and goals.

Understanding the Turbo Back Exhaust System

Before diving into product specifics, it’s important to understand what a turbo back exhaust system entails and why it matters for turbocharged vehicles like the Subaru WRX.

What Does a Turbo Back Exhaust Include?

A turbo back exhaust system begins immediately after the turbocharger outlet and continues all the way to the rear of the vehicle. This typically includes the downpipe, mid-pipe, catalytic converter (if applicable), muffler, and exhaust tips. By replacing the factory components with aftermarket parts designed for higher flow and reduced restrictions, the system enables the turbo to expel exhaust gases more efficiently.

Benefits of Upgrading to a Turbo Back Exhaust

  • Increased Horsepower and Torque: By reducing backpressure and improving exhaust scavenging, turbo back exhausts allow the turbocharger to spool more efficiently, translating into measurable gains in power output.
  • Enhanced Sound Quality: Most turbo back systems provide a more aggressive and sportier exhaust note, which can be tuned depending on your preference for loudness and tone.
  • Weight Reduction: Many aftermarket exhausts use lightweight materials such as stainless steel or titanium, reducing overall vehicle weight and improving handling.
  • Improved Durability: High-quality exhaust systems often feature superior craftsmanship and corrosion-resistant materials, resulting in longer lifespan compared to OEM parts.
  • Customization Potential: Various designs and finishes allow you to personalize the aesthetics and sound character of your WRX.

Considerations Before Installation

While turbo back exhaust upgrades provide substantial benefits, it’s important to consider certain factors to ensure compatibility and compliance:

  • Emissions Regulations: Some turbo back exhausts may remove or alter catalytic converters, potentially affecting emissions compliance and legal status in your region.
  • Installation Complexity: Turbo back exhaust installation can be involved, often requiring specialized tools and mechanical expertise, particularly when dealing with tight engine bay spaces or rusted bolts.
  • Sound Level: Turbo back exhausts vary widely in sound intensity, so choose a system that aligns with your local noise ordinances and personal preference.
  • Tuning Requirements: To maximize performance gains and maintain engine reliability, an ECU retune may be necessary after installing a turbo back exhaust.

Top-Rated Turbo Back Exhaust Systems for the Subaru WRX

After extensive research and testing, we’ve identified several turbo back exhaust systems that consistently receive high praise from the WRX community for their blend of performance, sound, build quality, and value. Below is a detailed overview of each option, including key features and what makes them stand out.

Invidia Q300

The Invidia Q300 is widely regarded as a benchmark in the WRX aftermarket exhaust scene. It offers an excellent balance between aggressive sound and daily drivability, making it a favorite for both spirited driving and street use.

  • Material & Construction: Constructed from high-grade stainless steel, the Q300 features a straight-through muffler design to maximize flow while minimizing weight.
  • Sound Profile: The exhaust tone is deep and throaty without being overly loud or obnoxious. It provides an exhilarating growl under acceleration and a smooth idle note.
  • Performance Gains: Users report noticeable improvements in throttle response and mid-range torque, thanks to the reduced backpressure.
  • Installation: The Q300 is relatively straightforward to install with basic mechanical skills, supported by comprehensive instructions and community resources.
  • Additional Features: Includes polished stainless steel tips that enhance the rear aesthetic of the WRX.

GrimmSpeed Turbo Back Exhaust

GrimmSpeed is a brand synonymous with Subaru performance parts, and their turbo back exhaust system is no exception. Engineered with a focus on maximizing exhaust flow and delivering a bold sound, it caters to performance enthusiasts who demand both function and flair.

  • Material & Construction: Crafted from T304 stainless steel with mandrel-bent piping to ensure smooth gas flow and durability under high temperatures.
  • Sound Profile: Produces a deep, aggressive, and somewhat guttural tone that resonates well with track and spirited street driving.
  • Performance Gains: Enhances turbo spool and peak horsepower, with many users pairing it with other GrimmSpeed tuning components for optimized results.
  • Installation: Designed with bolt-on ease in mind, the exhaust system fits precisely with minimal modifications needed.
  • Additional Features: Comes with a high-flow catalytic converter option for emission-conscious drivers.

Corsa Sport Turbo Back Exhaust

Corsa Sport is known for its patented Reflective Sound Cancellation (RSC) technology, which drastically reduces drone while preserving a sporty sound. Their turbo back exhaust system for the WRX is engineered to deliver a refined yet engaging driving experience.

  • Material & Construction: Made from high-quality stainless steel with a unique muffler design to minimize cabin drone.
  • Sound Profile: Provides a clean, sporty exhaust note under acceleration with an impressively quiet cabin experience during cruising speeds.
  • Performance Gains: Optimized flow characteristics improve turbo efficiency and throttle response without sacrificing comfort.
  • Installation: The exhaust system is designed for direct fitment and includes all necessary hardware for a smooth installation.
  • Additional Features: Polished exhaust tips add an elegant touch, and the system complies with many state regulations due to its catalytic converter compatibility.

Borla S-Type Turbo Back Exhaust

Borla is a well-established name in the exhaust industry, known for premium craftsmanship and sound tuning. The S-Type turbo back exhaust for the WRX emphasizes a balanced and refined exhaust note while delivering solid performance improvements.

  • Material & Construction: Manufactured from aerospace-grade T-304 stainless steel with a patented straight-through muffler design.
  • Sound Profile: Offers a sophisticated exhaust tone that is loud enough to be exhilarating but controlled enough to avoid excessive drone.
  • Performance Gains: Improves exhaust flow, aiding turbo spool and increasing power output across the RPM range.
  • Installation: The system features bolt-on fitment with precision engineering to ensure ease of installation.
  • Additional Features: Borla’s lifetime warranty underscores the exhaust system’s durability and quality assurance.

Comprehensive Video Analysis

To complement this detailed overview, we have prepared extensive video reviews of each turbo back exhaust system. These videos showcase real-world sound comparisons, installation procedures, and performance assessments to provide a holistic understanding of what to expect from each option.

Invidia Q300 Video Review

The video begins with a close-up of the Invidia Q300’s construction quality, highlighting its stainless steel finish and TIG welds. It then captures sound tests at idle, cruising, and full-throttle acceleration, demonstrating the exhaust’s deep and aggressive tone. Installation footage shows the removal of the stock exhaust and the step-by-step fitment of the Q300, which most users can complete within a few hours. Finally, dyno charts reveal horsepower and torque gains, validating the system’s performance benefits.

GrimmSpeed Exhaust Video Review

Our GrimmSpeed video showcases the exhaust’s bold sound profile both inside and outside the vehicle, emphasizing its track-ready character. The installation segment covers the removal of the stock turbo back system and the installation of the GrimmSpeed exhaust, highlighting the need for some penetrating oil on rusted bolts given the WRX’s age. The video also features user testimonials praising the exhaust’s tonal qualities and performance enhancement.

Corsa Sport Video Review

The Corsa Sport video focuses on the system’s unique sound cancellation technology. Viewers can hear the quiet cabin experience during highway cruising and the louder, sportier sound during acceleration. Installation is demonstrated as a relatively simple bolt-on process, with the video emphasizing the muffler design that minimizes drone. The video concludes with a discussion of how this exhaust is well-suited for drivers seeking performance without compromising daily comfort.

Borla S-Type Video Review

In the Borla S-Type video, the emphasis is on craftsmanship and sound refinement. The video captures a variety of driving scenarios, including city driving, highway cruising, and spirited runs, highlighting the exhaust’s balanced tone. Installation footage details the precision fitment and use of quality hardware. The video also compares the S-Type’s sound to the stock exhaust and other aftermarket options, illustrating its unique position in the market.

Installation Tips and Best Practices

Installing a turbo back exhaust can range from straightforward to moderately complex depending on your mechanical skill level and the specific vehicle model year. Here are some tips to ensure a successful installation:

  • Gather Proper Tools: Ensure you have a complete set of sockets, wrenches, penetrating oil, jack stands or a lift, and safety equipment.
  • Work on a Cool Engine: Exhaust components can become extremely hot. Always work on a cold engine to avoid burns.
  • Apply Penetrating Oil: Spray penetrating oil on all bolts and nuts beforehand to make removal easier and prevent stripping.
  • Follow Manufacturer Instructions: Each exhaust system comes with specific installation guides—adhere to these carefully for best results.
  • Check for Leaks: After installation, inspect all connections for exhaust leaks and tighten clamps or bolts as necessary.
  • Consider Professional Installation: If you’re not comfortable with the process, professional installers can ensure proper fitment and avoid costly mistakes.

Performance Tuning After Exhaust Installation

To truly unlock the benefits of a turbo back exhaust, tuning your Subaru WRX’s engine management system is highly recommended. Here’s why:

  • Optimized Air-Fuel Ratios: After upgrading the exhaust, the engine’s air-fuel mixture may become leaner, which can lead to performance loss or engine damage if not corrected.
  • Maximized Power Gains: Custom ECU tunes adjust boost levels, ignition timing, and fueling to complement the improved exhaust flow.
  • Smoother Throttle Response: Tuning can reduce turbo lag and improve acceleration feel.

Many aftermarket tuners and software providers offer WRX-specific maps tailored for popular exhaust upgrades, making the tuning process straightforward and effective.

Conclusion: Selecting the Ideal Turbo Back Exhaust for Your Subaru WRX

Choosing the right turbo back exhaust system for your Subaru WRX involves balancing multiple factors including sound preference, performance goals, budget, and installation capabilities. Each of the exhausts reviewed here brings distinct advantages:

  • Invidia Q300: Best for drivers seeking a versatile, aggressive sound paired with solid performance improvements and ease of installation.
  • GrimmSpeed: Ideal for performance enthusiasts who prioritize a bold exhaust note and are looking for a system that integrates well with other performance parts.
  • Corsa Sport: Perfect for those who want a sporty yet refined sound with minimal cabin drone, suitable for daily driving.
  • Borla S-Type: Suited to drivers looking for premium build quality, a balanced exhaust tone, and long-term durability backed by a warranty.

By reviewing the detailed video analyses and considering the practical installation and tuning advice provided, Subaru WRX owners can confidently select an exhaust system that best matches their driving style and desired outcome. Remember to factor in local regulations and ensure your vehicle remains compliant and safe on the road.

For additional resources, installation guides, and community feedback, consider visiting manufacturer websites and Subaru enthusiast forums where real-world user experiences can provide invaluable insight.