Here's why:
* Increased Airflow: Performance filters are designed to allow more air into the engine. This can sometimes lead to a slightly louder intake sound, as more air is rushing into the engine. You might hear a more pronounced intake roar, especially at higher RPMs.
* Filter Design: The design of the filter itself (e.g., the material, the shape, the size of the holes) can influence the sound. Some designs are inherently noisier than others.
* Engine Type: The type of engine significantly affects how noticeable any sound change is. Some engines are naturally louder than others, making a subtle change from a performance filter harder to detect.
* Intake System: The overall intake system (hoses, tubing, etc.) plays a much larger role in intake sound than the filter itself. Modifications to these components will have a much greater effect on the sound.
In short, while a performance air filter *might* make your car slightly louder, it's unlikely to be a significant or noticeable change for most people. If you're looking for a dramatic change in the sound of your car, you'll need to focus on modifications to the exhaust system.
