Long Tube Headers: How They Affect Your Fuel Ratio

Long tube headers are an aftermarket vehicle modification that can increase horsepower and improve the sound of a vehicle. They are not typically found stock on vehicles, which usually have a standard exhaust manifold. Long tube headers are also far from emissions regulations and can result in test failure. When installing long tube headers, it is recommended to also get a custom tune to get the most performance out of the vehicle. Some people have reported losing gas mileage after installing long tube headers, while others have reported an improvement or no change. It is important to note that changing to long tube headers may require adjustments to the fuel levels and that improper installation can result in exhaust leaks and potential carbon monoxide poisoning.

Long tube headers may require a custom tune to get the most performance

A custom tune can cost anywhere from $400 to $1000 and requires a skilled engine tuner to perform well. There is also the option of a bench tune, which is a pre-made tune that has been proven to work for your specific header size, engine, and intake. This type of tune is simpler and more affordable, costing between $100 and $150, but it may not provide the same level of performance improvement as a custom tune.

Some people have reported losing about 1-2 mpg on the highway after installing long tube headers, even after spending a couple of hours getting the tune dialed in and maintaining the same driving habits. However, others have reported improvements in fuel economy after getting a custom tune.

It is important to note that installing long tube headers can be a dangerous task and should only be attempted by those with serious mechanical skills and the proper equipment, such as a lift to safely install the headers. Overall, while a custom tune may not be necessary for long tube headers, it is highly recommended to get the most performance and efficiency out of your vehicle.

Long tube headers may result in a CEL (Check Engine Light) issue

In some cases, the issue may lie with the tune of the car. A custom tune may be required to get the most performance out of the long tube headers and prevent the CEL from illuminating. It is recommended to consult with a professional tuner or a mechanic who has experience with long tube header installations to address this issue effectively.

Additionally, the specific make and model of the car can also play a role in CEL issues. For example, in Ford Mustangs, the use of true Wideband sensors pre-cats and traditional O2 sensors post-cats can lead to a very tight test algorithm that may trigger a CEL even with known-good aftermarket green cats installed. This is a unique challenge faced by Mustang owners and requires specialized solutions.

Furthermore, the presence of catalytic converters can also impact the CEL. In some states, an actual "sniff" test is conducted for checking emissions, while others simply plug into the car's PCM port to check the status of sensors. If the rear O2 sensors are turned off to suppress the CEL, the car may fail the emissions test as the sensors will show an "OFF" status.

To summarize, long tube headers may result in a CEL issue due to various factors such as O2 sensor compatibility, tuning requirements, vehicle-specific challenges, and emissions testing procedures. It is important to carefully consider these factors and seek professional guidance when installing long tube headers to avoid potential issues and ensure optimal performance.

Long tube headers may cause a noticeable change in the vehicle's sound

Long tube headers are a popular aftermarket modification for vehicles, designed to improve exhaust flow efficiency and increase power output. They achieve this by reducing back pressure on the cylinders, with their larger diameter and additional piping providing more room for exhaust gases to flow through. However, they can also cause issues if not properly installed or tuned.

The installation of long tube headers can result in a louder and more powerful sound, with some describing it as "crazy" and "music to my ears". However, the increase in sound may be undesirable for those who prefer a quieter ride, especially considering that some states perform routine emissions testing which long tube headers may cause the vehicle to fail.

It is important to note that improper installation of headers can result in exhaust leaks into the cabin of the vehicle, leading to potential carbon monoxide poisoning of the driver and passengers. Therefore, it is recommended to have headers installed by a certified mechanic.

Long tube headers may not be street legal in some states due to emissions testing

Long tube headers are designed to provide maximum power across the RPM range. They are typically used for vehicles that are used strictly for racing on closed courses.

Long tube headers do not meet federal emissions standards and are not street legal in some states due to emissions testing. Shorty headers, on the other hand, are designed to accommodate all emissions control devices while offering increases in power. They are bolted to the engine in front of the catalytic converter, maintaining the stock position and meeting emissions regulations.

Some companies, such as JBA, work with the California Air Resources Board (CARB) to obtain Executive Orders (EO numbers) that certify their shorty headers to be emissions-legal in all 50 states. These products will be marked with an Emission Code 1.

It is important to note that companies such as Kooks Headers and Exhaust do not make any representation that their parts or systems have received an Executive Order or conform to the racing vehicles exemption. The purchasers are entirely responsible for informing themselves of applicable California laws and complying with those laws.

When considering long tube headers, it is essential to research the specific state's regulations and ensure that the headers are legal for street use in that state.

Long tube headers may not have a significant impact on fuel efficiency

Long tube headers are designed to improve the performance of your vehicle. They do this by reducing back pressure from the exhaust system, which in turn eases the engine's workload. This boost in efficiency can contribute to enhanced engine performance.

However, the impact of long tube headers on fuel efficiency is less clear-cut. While some people have reported a slight increase in fuel economy, others have noticed a drop in miles per gallon after installing long tube headers. This discrepancy could be attributed to changes in driving habits, as the improved performance may encourage drivers to operate their vehicles in a way that consumes more fuel.

Additionally, the effects of long tube headers on fuel efficiency can vary depending on the specific vehicle and its existing modifications. For example, long tube headers may have a more noticeable impact on fuel efficiency in cars with larger engines or those that have already been fine-tuned for performance. The quality of the headers themselves, including the materials used and the precision of the design, can also play a role in the overall outcome.

It's worth noting that while long tube headers may not significantly impact fuel efficiency, they can still provide other benefits such as increased horsepower and torque, improved throttle response, and a more aggressive exhaust note. As such, long tube headers are often chosen for their performance-enhancing capabilities rather than for any potential improvements in fuel efficiency.

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