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The Subaru WRX is known for its impressive performance, especially when modified for higher horsepower. One of the crucial components in a high-performance WRX is the clutch system. When tuning a WRX to handle over 600 horsepower, the choice between stock and aftermarket clutches becomes essential. This article examines the differences, advantages, and disadvantages of stock versus aftermarket clutches for the WRX.
Understanding Clutch Systems
The clutch system is responsible for engaging and disengaging the engine from the transmission, allowing for smooth gear changes. In high-performance applications, the clutch must withstand increased torque and power without slipping or failing.
Stock Clutches: Overview
Stock clutches are designed to handle the factory specifications of the WRX. They are reliable and provide a smooth driving experience under normal conditions. However, their performance can be limited when subjected to higher horsepower levels.
Advantages of Stock Clutches
- Designed for everyday driving and factory performance.
- Cost-effective option for those not pushing beyond factory power levels.
- Generally easier to install and maintain.
Disadvantages of Stock Clutches
- May slip under high horsepower conditions.
- Limited heat resistance and performance under stress.
- Not suitable for aggressive driving or racing applications.
Aftermarket Clutches: Overview
Aftermarket clutches are designed to handle increased power and torque, making them a popular choice for modified WRXs. They come in various materials and designs to cater to different performance needs.
Advantages of Aftermarket Clutches
- Higher torque capacity, suitable for 600+ horsepower applications.
- Improved heat resistance for better performance under stress.
- Variety of options tailored for racing, street, or mixed use.
Disadvantages of Aftermarket Clutches
- Higher cost compared to stock options.
- May require modifications for installation.
- Potentially harsher engagement, affecting daily drivability.
Performance Comparison
When comparing stock and aftermarket clutches for a WRX tuned to over 600 horsepower, several performance factors come into play. The clutch’s ability to handle increased torque and heat is paramount.
Torque Capacity
Stock clutches typically have a torque capacity suitable for the factory power levels, often around 300-350 lb-ft. Aftermarket clutches, however, can handle significantly more, often exceeding 600 lb-ft, making them a better choice for high-performance builds.
Heat Resistance
Aftermarket clutches are built with materials that can withstand higher temperatures, reducing the risk of fading or failure during aggressive driving. Stock clutches may struggle under prolonged high-stress conditions, leading to premature wear.
Choosing the Right Clutch
Deciding between a stock or aftermarket clutch for your WRX depends on your driving style and performance goals. Consider the following factors:
- Your horsepower and torque goals.
- Driving conditions (daily driving vs. racing).
- Your budget for clutch replacement.
- Desired engagement feel and drivability.
Conclusion
If you’re pushing your WRX beyond 600 horsepower, an aftermarket clutch is likely the better choice for performance and reliability. Stock clutches may suffice for lower power levels or casual driving, but for serious enthusiasts, investing in a quality aftermarket option can provide the durability and performance needed to handle the demands of high horsepower.