Best Exhaust Upgrades for Subaru Wrx Sti: Achieving 20+ Hp Gains with Grimmspeed or Cobb Cat-back Systems

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Best Exhaust Upgrades for Subaru WRX STI: Achieving 20+ HP Gains with Grimmspeed or Cobb Cat-Back Systems

The Subaru WRX STI is renowned for its impressive performance and rally-inspired design. One of the most effective ways to enhance its power and sound is through exhaust upgrades. In this article, we will explore the best cat-back exhaust systems available, focusing on Grimmspeed and Cobb, both of which are known for their quality and performance gains.

Why Upgrade Your Exhaust System?

Upgrading the exhaust system of your Subaru WRX STI can lead to significant performance improvements. Here are some reasons to consider an upgrade:

  • Increased Horsepower: Cat-back systems can provide gains of 20+ horsepower.
  • Improved Sound: A new exhaust system can enhance the aggressive sound of your vehicle.
  • Weight Reduction: Aftermarket systems often weigh less than stock components.
  • Better Exhaust Flow: Upgraded systems improve exhaust flow, enhancing engine efficiency.

Grimmspeed Cat-Back Exhaust System

The Grimmspeed Cat-Back Exhaust System is a popular choice among Subaru enthusiasts. It offers a balance of performance, sound, and build quality. Here are some key features:

  • Material: Made from high-quality stainless steel for durability.
  • Design: Features a straight-through design for optimal flow.
  • Sound: Produces a deep, aggressive tone without being overly loud.
  • Fitment: Designed for a perfect fit on the WRX STI models.

Performance Gains

Owners of the Grimmspeed Cat-Back Exhaust have reported impressive performance gains, often exceeding 20 horsepower. The improved exhaust flow allows the engine to breathe better, resulting in increased power, especially at higher RPMs.

Cobb Cat-Back Exhaust System

The Cobb Cat-Back Exhaust System is another excellent option for WRX STI owners. Known for its performance-oriented design, the Cobb system is engineered to maximize power and enhance the driving experience. Key features include:

  • Material: Constructed from high-grade stainless steel for longevity.
  • Design: Features a mandrel-bent design to ensure smooth exhaust flow.
  • Sound: Offers a more aggressive tone, especially under acceleration.
  • Compatibility: Designed to work seamlessly with other Cobb tuning products.

Performance Gains

Cobb’s Cat-Back Exhaust System is known for delivering substantial horsepower gains, frequently reported at over 20 HP. The optimized design allows for better exhaust scavenging, contributing to a more responsive throttle and improved overall performance.

Comparing Grimmspeed and Cobb Exhaust Systems

When choosing between Grimmspeed and Cobb, it’s essential to consider your preferences and driving style. Here are some factors to compare:

  • Sound Preference: Grimmspeed offers a more subtle tone, while Cobb provides a louder, more aggressive sound.
  • Design Philosophy: Grimmspeed focuses on a balance of performance and sound, whereas Cobb emphasizes maximum performance.
  • Price Point: Both systems are competitively priced, but Cobb may be slightly higher due to brand reputation.
  • Installation: Both systems are designed for easy installation, but professional help is recommended for best results.

Installation Tips

Installing a cat-back exhaust system can be a rewarding DIY project. Here are some tips to ensure a successful installation:

  • Tools Needed: Basic hand tools, including wrenches, sockets, and potentially a saw for cutting the old exhaust.
  • Safety First: Always wear safety gear and work in a well-ventilated area.
  • Follow Instructions: Refer to the manufacturer’s instructions for specific installation guidelines.
  • Check for Leaks: After installation, start the engine and check for any exhaust leaks.

Conclusion

Upgrading to a Grimmspeed or Cobb cat-back exhaust system can significantly enhance the performance and sound of your Subaru WRX STI. With gains of 20+ horsepower, both options provide excellent value for enthusiasts looking to unleash the full potential of their vehicle. Consider your personal preferences and driving style when making your choice, and enjoy the benefits of a more powerful and engaging driving experience.