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The Subaru WRX is known for its performance and tuning potential. One popular upgrade among enthusiasts is the installation of a turbo back exhaust system. In this article, we will explore the benefits of upgrading to a HKS 3.5-inch WRX turbo back exhaust, focusing on the power gains before and after the installation.
Understanding Turbo Back Exhaust Systems
A turbo back exhaust system replaces the entire exhaust system from the turbocharger to the rear of the vehicle. This upgrade allows for better exhaust flow, which can significantly improve engine performance. The HKS 3.5-inch turbo back exhaust is designed specifically for the WRX, providing optimal fitment and performance enhancements.
Benefits of Upgrading to the HKS 3.5-Inch Exhaust
- Increased Power Output: The larger diameter of the exhaust allows for improved exhaust flow, leading to higher horsepower and torque.
- Weight Reduction: Aftermarket exhaust systems often weigh less than stock systems, contributing to better overall performance.
- Improved Sound: The HKS exhaust provides a deeper and more aggressive sound, enhancing the driving experience.
- Enhanced Turbo Response: Better exhaust flow can lead to quicker spool times for the turbo, improving throttle response.
Before the Upgrade: Stock Exhaust Performance
Before upgrading to the HKS 3.5-inch turbo back exhaust, it is essential to understand the baseline performance of the stock exhaust system. The stock WRX exhaust is designed to meet emissions regulations while providing adequate performance. However, it can restrict airflow, limiting the potential power output of the engine.
Stock Performance Metrics
On a stock WRX, the following performance metrics are typical:
- Horsepower: Approximately 265 hp
- Torque: Approximately 258 lb-ft
- 0-60 mph: Around 5.4 seconds
After the Upgrade: HKS 3.5-Inch Exhaust Performance
After installing the HKS 3.5-inch turbo back exhaust, drivers can expect noticeable improvements in performance metrics. The increased diameter allows for better exhaust flow, resulting in higher power gains.
Performance Gains
Post-upgrade performance metrics typically include:
- Horsepower: Increased to approximately 300 hp
- Torque: Increased to approximately 290 lb-ft
- 0-60 mph: Improved to around 4.8 seconds
Installation Process of the HKS Exhaust
The installation of the HKS 3.5-inch turbo back exhaust can be performed by a professional or as a DIY project for those with mechanical skills. Here are the general steps involved in the installation process:
- Preparation: Gather tools and ensure the vehicle is securely lifted.
- Remove Stock Exhaust: Detach the stock exhaust system from the turbo and hangers.
- Install HKS Exhaust: Align and attach the HKS exhaust system to the turbo and secure it in place.
- Check for Leaks: Start the engine and inspect for any exhaust leaks.
Conclusion: Is the Upgrade Worth It?
Upgrading to a HKS 3.5-inch turbo back exhaust can provide significant performance benefits for the Subaru WRX. With increased horsepower, torque, and improved throttle response, this upgrade is a popular choice among enthusiasts. The enhanced sound and weight reduction further contribute to a more enjoyable driving experience. For those looking to maximize their WRX’s potential, this upgrade is certainly worth considering.