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The Toyota A90 Supra has taken the automotive world by storm, and enthusiasts are eager to enhance its performance and sound. Among the popular modifications are downpipes, with HKS and Borla being two leading brands. This article will delve into a sound comparison of HKS vs. Borla A90 Supra downpipes, highlighting their performance on the dyno.
Understanding Downpipes
Downpipes play a crucial role in a vehicle’s exhaust system. They connect the turbocharger to the rest of the exhaust system, allowing for improved airflow and performance. Upgrading to high-performance downpipes can help reduce turbo lag, increase horsepower, and enhance the overall sound of the vehicle.
HKS A90 Supra Downpipe Overview
The HKS downpipe is known for its high-quality construction and performance gains. Made from stainless steel, it offers durability and resistance to corrosion. The design focuses on optimizing exhaust flow, which can lead to noticeable improvements in horsepower and torque.
Key Features of HKS Downpipe
- Stainless steel construction for longevity.
- Optimized design for improved exhaust flow.
- Enhanced turbo response and power gains.
- Direct fit for easy installation.
Borla A90 Supra Downpipe Overview
Borla is another prominent name in the aftermarket exhaust industry, and their A90 Supra downpipe is designed to deliver an aggressive sound and improved performance. Featuring a mandrel-bent design, the Borla downpipe ensures smooth exhaust flow, which is essential for maximizing engine performance.
Key Features of Borla Downpipe
- Mandrel-bent piping for optimal flow.
- Durable construction with high-quality materials.
- Distinctive aggressive sound profile.
- Designed for easy installation with factory mounting points.
Sound Comparison on the Dyno
To truly understand the differences between the HKS and Borla downpipes, we conducted sound tests on the dyno. Each downpipe was installed on a stock A90 Supra, and the sound levels were measured under various conditions, including idle, revving, and full throttle.
Idle Sound Levels
At idle, the sound profile of the HKS downpipe is deep and throaty, providing a subtle yet noticeable presence. In contrast, the Borla downpipe produces a more aggressive tone, immediately giving the impression of enhanced performance.
Revving Sound Levels
When revving the engine, the HKS downpipe maintains a smooth and refined sound, which appeals to those who prefer a more understated exhaust note. The Borla, however, unleashes a louder and more aggressive sound, making it ideal for enthusiasts looking for a more pronounced auditory experience.
Full Throttle Sound Levels
Under full throttle, the HKS downpipe provides a powerful roar that resonates throughout the RPM range, offering a thrilling driving experience. The Borla downpipe, on the other hand, delivers an even more aggressive sound, with a sharper and more pronounced exhaust note that many performance drivers crave.
Performance Gains on the Dyno
In addition to sound, performance gains are a critical aspect of evaluating downpipes. Both the HKS and Borla downpipes were tested on the dyno to measure horsepower and torque improvements.
HKS Performance Results
The HKS downpipe showed impressive gains, with an increase of approximately 15-20 horsepower and a similar torque increase. These results highlight the effectiveness of the HKS design in improving exhaust flow and turbo efficiency.
Borla Performance Results
In comparison, the Borla downpipe yielded slightly higher gains, with an increase of around 20-25 horsepower and torque. The mandrel-bent design contributes to these improved performance figures, showcasing Borla’s focus on maximizing engine output.
Final Thoughts: HKS vs. Borla
Both the HKS and Borla downpipes offer unique advantages for the A90 Supra. The HKS downpipe is perfect for those seeking a refined sound and solid performance gains, while the Borla downpipe caters to enthusiasts looking for an aggressive auditory experience and slightly higher performance numbers.
Choosing the Right Downpipe for You
Ultimately, the choice between HKS and Borla comes down to personal preference. Consider the following factors when making your decision:
- Desired sound profile (refined vs. aggressive).
- Performance goals and expected gains.
- Budget and installation considerations.
By weighing these factors, you can select the downpipe that best suits your driving style and preferences, ensuring an enhanced driving experience with your A90 Supra.