Delve into the realm of G35 high flow cats, where enhanced performance, captivating sound, and reduced emissions converge. As we unravel the intricacies of these catalytic converters, discover their transformative impact on the driving experience and the environment.
G35 high flow cats are meticulously engineered to optimize exhaust gas flow, unleashing hidden horsepower and torque. Prepare to witness dyno-proven gains that will leave you exhilarated behind the wheel.
Contents
Performance Benefits of G35 High Flow Cats

G35 high flow catalytic converters (cats) offer significant performance enhancements by improving exhaust gas flow and reducing backpressure. These upgrades result in increased horsepower, torque, and responsiveness, particularly in higher RPM ranges.
Dyno Results
Dyno tests have consistently demonstrated the performance benefits of G35 high flow cats. For example, a dyno test on a 2005 G35 sedan equipped with high flow cats showed an increase of 10 horsepower and 12 lb-ft of torque at the wheels.
Exhaust Gas Flow
High flow cats feature a larger surface area and optimized internal structure compared to stock cats. This allows for increased exhaust gas flow, reducing backpressure and improving scavenging. Enhanced scavenging promotes more efficient combustion, resulting in better power output and fuel economy.
Horsepower and Torque
The reduced backpressure and improved exhaust gas flow directly translate into increased horsepower and torque. High flow cats allow the engine to breathe more freely, enabling it to produce more power throughout the RPM range. The most noticeable gains are typically observed in the mid to high RPM range, where the engine is operating at its peak efficiency.
Installation and Compatibility

Installing G35 high flow cats is a relatively straightforward process, but it does require some mechanical knowledge and tools. Here are the general steps involved:
- Gather your tools and materials. You will need a jack, jack stands, a wrench set, a socket set, and a new set of G35 high flow cats.
- Safety first! Park your G35 on a level surface and engage the parking brake. Allow the engine to cool completely before beginning work.
- Raise the front of the G35 using the jack and secure it with the jack stands.
- Locate the catalytic converters. They are typically located under the car, near the engine.
- Disconnect the oxygen sensors from the catalytic converters.
- Unbolt the catalytic converters from the exhaust system.
- Install the new G35 high flow cats in the reverse order of removal.
- Tighten all bolts and nuts to the specified torque.
- Reconnect the oxygen sensors.
- Lower the G35 and remove the jack stands.
Compatibility
G35 high flow cats are compatible with all G35 models from 2003 to 2007. However, there are some minor differences in the installation process depending on the year of your G35.
- 2003-2004 G35s: The catalytic converters are located in two separate banks, one on each side of the engine. To access the catalytic converters, you will need to remove the front bumper.
- 2005-2007 G35s: The catalytic converters are located in a single bank, under the center of the car. To access the catalytic converters, you will need to remove the exhaust manifold.
In addition to the above, you may also need to make some minor modifications to your exhaust system to accommodate the new G35 high flow cats. For example, you may need to cut and weld the exhaust pipes to fit the new cats.
Design and Construction: G35 High Flow Cats

G35 high flow catalytic converters are engineered with a focus on optimizing exhaust flow and emissions reduction. Their internal structure comprises a honeycomb substrate coated with a precious metal catalyst. This substrate is typically made of ceramic or metallic materials, each offering unique advantages and characteristics.
Substrate Materials
Ceramic Substrates: Ceramic substrates are commonly used in high flow cats due to their high thermal stability and resistance to degradation. They are porous, allowing exhaust gases to flow through the honeycomb structure and interact with the catalyst. Ceramic substrates are relatively inexpensive and lightweight, making them a popular choice for aftermarket applications.
Metallic Substrates: Metallic substrates, typically made of stainless steel or Inconel, provide higher durability and resistance to mechanical stress compared to ceramic substrates. They are less prone to cracking or breaking, making them suitable for applications where durability is paramount. Metallic substrates are more expensive than ceramic substrates but offer longer service life.
Catalyst Coating, G35 high flow cats
The honeycomb substrate is coated with a precious metal catalyst, typically platinum, palladium, or rhodium. These metals act as catalysts, promoting chemical reactions that convert harmful pollutants in exhaust gases into less harmful substances. The catalyst coating is carefully formulated to maximize catalytic efficiency while ensuring durability and longevity.
Construction Techniques
High flow cats are manufactured using various techniques, including:
- Brazing: In this method, the substrate and end caps are joined together using a high-temperature brazing alloy. Brazing provides a strong and leak-proof seal, ensuring the integrity of the converter.
- Welding: Welding involves fusing the substrate and end caps together using a welding torch. This technique offers a robust and durable connection, suitable for demanding applications.
- Clamping: Clamping involves securing the substrate between two end caps using clamps or bolts. This method is less permanent than brazing or welding but allows for easier disassembly and maintenance.
Pricing and Availability

G35 high flow cats vary in price depending on factors such as brand, material, and features. Generally, you can expect to pay between $300 to $800 per pair.
Several retailers and manufacturers offer G35 high flow cats. You can find them online through websites like Amazon and eBay, as well as from automotive performance shops and dealerships.
Many reputable brands provide warranties for their G35 high flow cats, ranging from one year to a lifetime. Additionally, some retailers offer customer support and technical assistance to help you with installation and troubleshooting.
Wrap-Up

In conclusion, G35 high flow cats represent a symphony of performance, sound, and environmental consciousness. Whether seeking to elevate your driving experience or contribute to a cleaner future, these catalytic converters stand as a testament to automotive innovation.
Clarifying Questions
What are the benefits of installing G35 high flow cats?
G35 high flow cats enhance horsepower and torque, improve exhaust gas flow, and reduce emissions.
How difficult is it to install G35 high flow cats?
Installation typically requires basic mechanical skills and can be completed in a few hours.
Do G35 high flow cats affect the sound of my exhaust?
Yes, G35 high flow cats can produce a deeper, more aggressive exhaust note.
Are G35 high flow cats legal?
The legality of G35 high flow cats varies by state and country. It is recommended to check local regulations before installation.


