Reasons why headers *might* improve fuel mileage:
* Improved exhaust flow: Headers typically improve exhaust flow, allowing the engine to breathe more efficiently. This can lead to slightly better combustion and potentially better fuel economy.
Reasons why headers *might not* improve fuel mileage, or might even slightly decrease it:
* Increased engine load: While headers improve flow, they can also slightly increase engine load at certain RPMs due to reduced back pressure. This extra load might offset any gains in efficiency.
* Other factors: Fuel economy is impacted by many factors, including driving style, tire pressure, terrain, and vehicle maintenance. The effect of headers might be masked by these other variables.
* Increased noise: The improved exhaust flow usually results in a louder exhaust note. This is not directly related to fuel efficiency, but a side effect to consider.
In short: While there's a *possibility* of a marginal increase in fuel mileage with headers, it's not a significant or reliable improvement. Don't expect a dramatic change. If improved fuel economy is your primary goal, other modifications (like proper tire inflation and efficient driving habits) would likely yield much better results.
