The Infiniti G35 has been for quite some time the darling of enthusiasts, from its sleek design to rear-wheel drive and that mighty VQ35DE and VQ35HR engine. Though the G35 is an out-and-out performer right from the factory, owners are always keen on opting for additional enhancements to enjoy their driving experience more. Many enquire about test pipe installation – essentially replacing the catalytic converters from the stock exhaust system to gain quite a few improvements in performance, sound, and response.
What Are Test Pipes?
Test pipes for G35 are aftermarket exhaust components to replace the catalytic converters in the exhaust system of a vehicle. They eliminate harmful emissions but restrict exhaust flow at the same time. Test pipes remove these restrictions; thus, they leave the exhaust gasses with a more direct route out of the engine.
Test pipes are installed between the exhaust manifold or headers and the rest of the exhaust system in the G35. They come in different designs, materials, and configurations to suit one’s needs and preferences.
Benefits of Installing Test Pipes on a G35
More Power and Torque
Improving exhaust flow, the test pipes remove restrictive catalytic converters, thus reducing back pressure within the system. As a result, the engine breathes more effortlessly and the increases can be dramatic in horsepower and torque. For the G35, these increases are heavily noted around the mid to high RPM regions, where the VQ engine is really at its best.
Improved Exhaust Note
The test pipes make the exhaust note heavily profound but giving the G35 louder and more aggressive tones. Catalytic converters removal accentuates the natural sound of the engine to produce a raw and sporty exhaust note that many enthusiasts love.
Sharper Throttle Response
Since the better flow of exhaust creates quicker expulsion of gasses, it would mean a sharper throttle response. And that’s particularly a great benefit, especially in spirited driving or on the track.
Weight Reduction
Catalytic converters are often heavy due to their dense construction and the materials they contain. Replacing them with lightweight test pipes reduces overall vehicle weight, contributing to improved performance and handling.
Considerations When Installing Test Pipes
Emissions and Legality
Another serious drawback of test pipes is their effect on emissions compliance. In places with stringent emissions regulations, catalytic converters are to be attached, and hence the test pipes are usually not approved for street use. Before mounting test pipes, familiarize yourself with local regulations.
Removing the catalytic converters can activate the check engine light (CEL) as the car’s oxygen sensors perceive the alteration in emissions. A lot of G35 owners correct this by installing a tune for the ECU or O2 sensor spacers to suppress a CELL.
Resonated vs. Non-Resonated Test Pipes
Test pipes are available in resonated and non-resonated versions. Resonated test pipes include a resonator to help reduce excessive noise and drone, making them more suitable for daily driving. Non-resonated test pipes, on the other hand, provide maximum sound and performance gains but can be too loud for some drivers.
Choosing the Right Test Pipes for Your G35
When selecting test pipes for your G35, consider the following factors:
Material- The most common material for the test pipes is stainless steel as it is strong, corrosion resistant, and can tolerate extreme temperature.
Fitment- Test pipes designed solely to fit the G35 will not have compatibility issues. Some aftermarkets may need a little modification or added hardware for proper installation.
Brand Reputation: Stick to test pipes from known brands that go toe to toe with quality and performance such as Berk Technology, ISR Performance, or Megan Racing.
Conclusion
The best thing about installing test pipes on your Infiniti G35 would be additional performance and transformation of the exhaust sound. At the same time, although they really help in improving matters, it is crucial to weigh out the possible negatives of this installation, especially as regards emissions compliance and noise levels. Having chosen wisely and installed correctly, your G35 will stand out on the road and at the track.