Test Pipes - Pros and Cons

Introduction to Test Pipes

Test pipes are aftermarket exhaust components that replace the catalytic converter with a straight-through pipe. They are designed to improve exhaust flow and performance by eliminating the restrictions caused by the catalytic converter.

Why Should You Use Test Pipes?

1. Increased Performance: Removing the catalytic converter reduces backpressure, increasing horsepower and torque.
2. Improved Exhaust Flow: Provides a straight-through design for optimal exhaust flow.
3. Enhanced Sound: Produces a louder and more aggressive exhaust note.
4. Weight Reduction: Eliminates the weight of the catalytic converter, reducing overall vehicle weight.

Pros of Using Test Pipes

1. Maximum Performance: Provides the best exhaust flow and highest power gains by eliminating the catalytic converter.
2. Aggressive Sound: Produces a louder and more aggressive exhaust note, enhancing the driving experience.
3. Weight Reduction: Reduces the overall weight of the vehicle by removing the catalytic converter.

Cons of Using Test Pipes

1. Emissions Compliance: Not legal for street use in many areas due to emissions regulations.
2. Increased Odor: Can produce a strong exhaust smell, as the catalytic converter is responsible for reducing harmful emissions.
3. Potential for CEL: Removing the catalytic converter can trigger the check engine light due to altered exhaust gas readings.
4. Environmental Impact: Increases harmful emissions, contributing to air pollution.

Popular Brands

• Invidia: Known for high-performance test pipes. Invidia at JM Auto Racing
• AMS Performance: Provides durable and effective test pipes. AMS Performance at JM Auto Racing

Installation and Maintenance

Installation Steps:

1. Preparation: Gather necessary tools, including a jack, jack stands, socket set, and lubricant.
2. Removing the Catalytic Converter: Lift the vehicle and remove the catalytic converter by disconnecting it from the exhaust system.
3. Fitting the Test Pipe: Install the test pipe, ensuring proper alignment and fitment.
4. Securing the Test Pipe: Use the provided hardware to secure the test pipe to the exhaust system.
5. Testing: Start the vehicle and check for exhaust leaks and proper function.

Case Studies and Real-World Examples

A 2018 Subaru WRX STI with Invidia test pipes demonstrated significant performance gains and an aggressive exhaust note. The owner reported increased horsepower, better throttle response, and a louder exhaust sound. Installation took about 2 hours with basic tools.

A 2017 Nissan 370Z with AMS Performance test pipes showed maximum performance improvements and a deeper exhaust tone. Users reported improved exhaust flow, reduced backpressure, and enhanced driving experience. Installation took about 3 hours with basic tools and professional assistance.

Conclusion

Test pipes offer significant performance benefits by eliminating the catalytic converter and providing a straight-through exhaust design. However, they come with legal and environmental drawbacks due to increased emissions. With various high-quality brands available, there’s a test pipe solution for every performance enthusiast looking to maximize exhaust flow and power gains.