Performance Clutch and Transmission Upgrades for 400+ Hp Wrx E85 Builds

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The Subaru WRX is a beloved performance car, known for its rally heritage and impressive power capabilities. For those looking to push their WRX beyond 400 horsepower, especially when running E85 fuel, upgrading the clutch and transmission is essential. This article discusses the best performance clutch and transmission upgrades that can handle the increased power and provide a reliable driving experience.

Understanding the Need for Upgrades

As the power output of a WRX increases, the stock clutch and transmission components may struggle to cope with the added stress. Upgrading these components not only improves performance but also enhances durability and drivability. Key reasons for upgrading include:

  • Increased torque handling capacity
  • Improved engagement and feel
  • Better heat dissipation
  • Enhanced reliability under high-stress conditions

Performance Clutch Options

When upgrading the clutch for a 400+ hp WRX on E85, consider the following options:

  • Stage 2 Clutch Kits: Designed for moderate power increases, these kits provide a good balance of performance and drivability.
  • Stage 3 Clutch Kits: These are ideal for serious power builds, offering high torque capacity and improved engagement.
  • Single-Mass Flywheel: Replacing the dual-mass flywheel with a single-mass option can reduce weight and improve throttle response.
  • Multi-Plate Clutch Systems: For extreme builds, multi-plate systems provide the highest torque capacity and are suited for racing applications.

Several brands are known for their quality performance clutches suitable for WRX builds. Here are some top recommendations:

  • Exedy: Known for their high-quality clutch kits, Exedy offers a variety of options for WRX enthusiasts.
  • ACT (Advanced Clutch Technology): ACT clutches are designed for high-performance applications and are well-regarded in the racing community.
  • Clutch Masters: Offering a range of performance clutches, Clutch Masters is known for their durability and performance.
  • South Bend Clutch: Specializing in performance and heavy-duty clutches, South Bend offers options that can handle high power levels.

Transmission Upgrades

In addition to the clutch, the transmission must also be capable of handling the increased power. Here are some key upgrades to consider:

  • Short Throw Shifter: Reduces the distance the shifter travels, allowing for quicker gear changes and improved driving experience.
  • Upgraded Gear Sets: Consider upgrading to stronger gear sets that can handle higher torque loads without failure.
  • Transmission Mounts: Upgraded mounts can reduce movement during hard shifts, improving engagement and reducing wear.
  • Oil Cooler: Installing a transmission oil cooler can help maintain optimal temperatures under high-stress conditions.

For transmission upgrades, several brands stand out for their reliability and performance:

  • Exedy: Besides clutches, Exedy also offers performance transmission components that are well-regarded.
  • ACT: Known for their heavy-duty components, ACT provides options for enhancing the WRX transmission.
  • Torque Solutions: Specializing in performance mounts and shifters, Torque Solutions offers products that improve transmission performance.
  • Subaru OEM Parts: Sometimes, the best upgrades come from the manufacturer. Consider OEM parts for reliability and fitment.

Installation Considerations

Installing performance clutches and transmission components can be a complex process. Here are some considerations to keep in mind:

  • Professional Installation: Unless you have experience, consider having a professional mechanic handle the installation.
  • Break-In Period: Allow for a break-in period for new clutches to ensure proper seating and longevity.
  • Regular Maintenance: Keep an eye on fluid levels and perform regular maintenance to prolong the life of your upgraded components.
  • Compatibility: Ensure that all components are compatible with your specific WRX model and year.

Conclusion

Upgrading the clutch and transmission in a 400+ hp WRX running E85 is crucial for maximizing performance and reliability. By choosing the right components and ensuring proper installation, you can enjoy a thrilling driving experience without compromising durability. With the right upgrades, your WRX can truly shine on the road and track.