Infiniti G37 is a luxury sports coupe and sedan which has attracted car enthusiasts by its sleek design and a powerful VQ37VHR engine. Although the G37 is impressive on the stock, most owners are interested in upgrading it with some aftermarket modifications to fully put this car up to work. Among all the exhaust system upgrades, the test pipes installation is the most significant. Test pipes replace the factory catalytic converters, offering significant performance gains, a more aggressive exhaust note, and improved throttle response.
What Are Test Pipes?
Test pipes are aftermarket components designed to replace the stock catalytic converters in the exhaust system. Catalytic converters, while essential for reducing harmful emissions, are restrictive and impede exhaust flow. Test pipes eliminate this restriction, providing a direct and unobstructed path for exhaust gasses.
Typically, the location for test pipes for an Infiniti G37 test pipes is between the headers and the mid-pipe or cat-back exhaust system. They have two main types, which are categorized as either resonated or non-resonated, for varying performance and sound outputs.
Benefits of Installing Test Pipes on a G37
Increased Horsepower and Torque
Improved airflow is what the VQ37VHR engine thrives on, and a test pipe delivers that by lowering backpressure. This reduces exhaust gasses to a further extent, thereby providing tangible horsepower and torque gains, specifically at higher RPMs. Adding a high-flow exhaust system coupled with an ECU tune enhances it further.
Louder and Deeper Exhaust Note
Test pipes radically change the G37’s exhaust sound. Taking away the catalytic converters, it opens up the engine to its natural tone and thus makes the exhaust sound louder, raspier, and a bit aggressive. Test pipes are often opted for if one wants their G37 to behave as a performance car.
Better Throttle Response
With this improvement, the flow of exhaust gasses will improve, which will free breathe and allow the engine to react promptly on the throttle. This is more noticeable in spirited driving or a track where instant power delivery is paramount.
Weight Loss
Factory catalytic converters are weight-intensive because of their dense buildup. The use of lightweight test pipes reduces vehicle weight, further contributing to improved performance and handling.
Test Pipes: Resonated vs. Non-Resonated
Resonated Test Pipes
These include built-in resonators to minimize excessive noise and reduce exhaust drone. They are ideal for drivers who want performance gains and a louder exhaust without compromising daily driving comfort.
Non-Resonated Test Pipes
Non-resonated test pipes maximize airflow and deliver the most aggressive exhaust note. However, they can be quite loud and may produce unwanted rasp or drone, making them more suitable for track-oriented builds.
Considerations Before Installation
Emissions Compliance
Test pipes eliminate catalytic converters. This means that they do not comply with emission regulations in most regions. Driving on public roads may lead to fines or failed inspection. Check local laws before installation to steer clear of legal headaches.
CEL
Removing the catalytic converters can cause the check engine light to turn on because the oxygen sensors are detecting changes. Many owners of the G37 fix this by getting an ECU tune or O2 sensor spacers to avoid the CEL.
Noise Levels
Test pipes can greatly boost the noise level of the exhaust system. If using the car as a daily driver, consider resonated test pipes to keep noise levels in control.
Choosing the Right Test Pipes for Your G37
Test pipes should be of good quality with proper fitment for optimal performance and reliability. Stainless steel is a popular material of choice in that its durability and resistance to corrosion qualify it. High-quality brands, such as ISR Performance, Berk Technology, and Megan Racing, produce test pipes specifically designed for the Infiniti G37 for proper installation with no hassle.
Final Thoughts
Test pipes are a popular modification for Infiniti G37 test pipes owners looking to enhance performance and sound. While they offer significant benefits, it’s important to consider the potential drawbacks, including emissions compliance and increased noise levels. With proper research and installation, test pipes can transform your G37 into a more dynamic and exhilarating driving machine, making it a standout both on the road and at the track.
