ISR Long Tube Headers for the Infiniti G37: A Comprehensive Guide
The Infiniti G37, a sporty and stylish coupe and sedan, is a popular choice for modification enthusiasts. One popular upgrade is the installation of long tube headers, often from companies like ISR (Injen Supercharger Research). But what exactly are long tube headers, and are they the right choice for your G37? This comprehensive guide will delve into the benefits, drawbacks, and considerations surrounding ISR long tube headers for the G37.
What are Long Tube Headers?
Long tube headers are exhaust system components that replace the factory manifolds. Instead of short, restrictive pipes merging close to the engine, long tube headers feature longer, individually tuned pipes for each cylinder, extending further before converging into a collector. This design allows for improved exhaust scavenging, leading to several performance gains.
Benefits of ISR Long Tube Headers on a G37:
- Increased Horsepower and Torque: The primary benefit is a noticeable increase in horsepower and torque, especially in the higher RPM ranges. This is due to the improved scavenging effect, allowing for better engine breathing.
- Improved Exhaust Flow: The longer, less restrictive pipes significantly improve the flow of exhaust gases, reducing backpressure and allowing the engine to breathe more efficiently.
- Enhanced Engine Sound: Many owners appreciate the more aggressive and throatier exhaust note produced by long tube headers. This is a subjective benefit, but a significant one for many enthusiasts.
Drawbacks of ISR Long Tube Headers on a G37:
- Potential for Check Engine Light (CEL): Long tube headers can sometimes trigger a check engine light due to changes in the exhaust gas composition and oxygen sensor readings. This often requires a tune to resolve.
- Cost: Long tube headers are a relatively expensive modification compared to other upgrades. The cost includes the headers themselves, installation, and potentially tuning.
- Installation Complexity: Installation can be labor-intensive and may require professional assistance. Some modifications to other components might also be necessary.
- Emissions: Long tube headers can potentially affect emissions compliance, particularly in areas with strict emissions testing regulations.
What are the Differences Between ISR Long Tube Headers and Other Brands?
ISR, known for their performance parts, offers a specific design and build quality for their long tube headers. The exact differences compared to other brands will vary, focusing on factors like material, pipe diameter, collector design, and overall construction. While direct comparisons require detailed specifications from competing manufacturers, ISR often highlights features like optimized scavenging, improved flow characteristics, and robust construction using high-quality materials. Researching specific model numbers and comparing specifications from various manufacturers is key to making an informed decision.
Do I Need a Tune with ISR Long Tube Headers?
While not always strictly required, a tune is highly recommended when installing ISR long tube headers on a G37. This is because the changes in exhaust flow can alter the air-fuel mixture and potentially lead to issues like a check engine light, poor performance, or even damage to the engine. A professional tune optimizes the engine's parameters to account for the modifications, maximizing performance and preventing potential problems.
Are ISR Long Tube Headers Legal in My Area?
The legality of long tube headers varies considerably depending on your location and the specific regulations regarding emissions and modifications. Some areas may have stricter emissions testing procedures, while others may be more lenient. It's crucial to check your local regulations before installing long tube headers to ensure compliance.
How Much Power Can I Expect to Gain with ISR Long Tube Headers?
The exact power gains from ISR long tube headers on a G37 vary based on several factors including the specific engine variant, supporting modifications (intake, exhaust, tune, etc.), and individual vehicle condition. However, you can generally expect a noticeable increase in both horsepower and torque, particularly in the upper RPM range. While specific figures are difficult to guarantee without dyno testing, many users report gains in the range of 10-20 horsepower and a similar increase in torque. This is a considerable boost that will enhance the driving experience.
Choosing ISR long tube headers, or any long tube headers for that matter, for your G37 involves careful consideration of the benefits, drawbacks, and potential complications. Understanding these aspects will enable you to make an informed decision that aligns with your goals and driving style. Remember to always prioritize professional installation and tuning to ensure optimal performance and safety.
