The OEM intake system includes resonators in the hose connecting the air box to the throttle body designed to reduce supercharger whine. The APR intake system in Stage 1 form replaces the factory air box and filter, and will deliver roughly 11 AWHP over stock. The Stage 2 back pipe when combined with the Stage 1 Air box will increase power further to around 15 AWHP and will slightly increase intake supercharger whine.