Driving in dusty environments without a S&B Particle Separator will cause your filter to quickly load with dirt resulting in loss of horsepower due to increased restriction. While there is a small amount of added restriction when using the S&B Particle Separator when comparing it to a clean stock air filter, the Particle Separator will allow you to maintain your horsepower for a much longer period of time by keeping your air filter substantially cleaner throughout your ride. Visit the Particle Separator landing page for more information.