The factory intake design has the foundation for excellent performance, but much of this is sacrificed in an effort to meet other design requirements. With requirements set forth for only supporting factory power output levels, low engine'sound levels and long service intervals, there is plenty of room for improvement.
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 I form replaces the factory air box and filter, and will deliver roughly 11 AWHP over stock. The Stage II back pipe when combined with the Stage I Air box will increase power further to around 15 AWHP and will slightly increase intake'supercharger whine.