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The Nissan 370Z is a popular sports car known for its performance and tuning potential. One of the most significant upgrades enthusiasts consider is the downpipe replacement. In this article, we will explore the differences between the stock downpipe and the Borla catless downpipe for the N54 engine, focusing on real-world gains in horsepower.
Understanding Downpipes
A downpipe is a crucial component of the exhaust system, connecting the turbocharger to the rest of the exhaust. It plays a vital role in how efficiently exhaust gases are expelled from the engine. Upgrading to a performance downpipe can significantly enhance engine performance by reducing back pressure and improving exhaust flow.
Stock Downpipe Overview
The stock downpipe on the 370Z is designed to meet emissions standards while providing adequate performance for daily driving. However, it often restricts exhaust flow, which can limit power output, especially when the vehicle is tuned for higher performance.
Features of the Stock Downpipe
- Factory design focused on emissions compliance.
- Smaller diameter piping compared to aftermarket options.
- Includes catalytic converters that restrict flow.
Borla Catless Downpipe Overview
The Borla catless downpipe is an aftermarket upgrade designed to maximize performance. By eliminating the catalytic converters, this downpipe allows for unrestricted exhaust flow, which can lead to significant power gains when combined with an appropriate tune.
Features of the Borla Catless Downpipe
- Larger diameter piping for improved flow.
- Removes catalytic converters to reduce back pressure.
- Designed for maximum performance and sound enhancement.
Performance Gains with the Borla Downpipe
Many enthusiasts report substantial gains in horsepower after installing a Borla catless downpipe. In real-world tests, gains of 80+ wheel horsepower (WHP) can be achieved when combined with a proper tune. This section will delve into the specifics of these gains.
Real World Testing Results
In a series of tests conducted on a tuned 370Z, the following results were observed:
- Stock downpipe: 300 WHP on a tuned setup.
- Borla catless downpipe: 380 WHP on the same tuned setup.
- Overall gain: 80 WHP with the Borla downpipe installed.
Factors Influencing Performance Gains
Several factors contribute to the performance gains observed with the Borla catless downpipe:
- Tuning: A proper tune is essential to realize the full potential of the downpipe.
- Supporting mods: Additional modifications such as intake upgrades can further enhance performance.
- Fuel quality: Higher octane fuel can improve performance and reliability.
Installation Considerations
Installing a Borla catless downpipe requires some mechanical knowledge and tools. Here are some key considerations:
- Professional installation is recommended for those unfamiliar with exhaust systems.
- Ensure all gaskets and hardware are included for a proper seal.
- Be prepared for potential check engine lights due to the removal of catalytic converters.
Legal and Emissions Considerations
While the Borla catless downpipe offers significant performance benefits, it is essential to consider legal and emissions implications. In many regions, removing catalytic converters is illegal and can lead to failing emissions tests.
What to Know About Emissions Compliance
- Check local laws regarding emissions and exhaust modifications.
- Consider a catted downpipe if emissions compliance is a concern.
- Be aware that using a catless downpipe may void warranties or affect insurance.
Conclusion
Upgrading to a Borla catless downpipe on a tuned 370Z can yield impressive performance gains of 80+ WHP. While the benefits are substantial, it’s essential to weigh the potential legal and emissions issues. Enthusiasts looking to maximize their vehicle’s performance should consider all aspects before making the upgrade.