The K&N Performance Airbox is designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. Replacing the restrictive factory air filter and air box allows your engine to inhale more air than with the factory air filter assembly.
A fully enclosed injection molded air box connects to the factory air intake hose. The removable lid provides easy access to the filter when cleaning is required.
Estimated Horsepower Gain: 8.5 HP @ 5200 RPM
DETAILS
Increases horsepower
Designed to improve torque and acceleration
Replaces entire factory air box and air filter system
![[K&N] Intake Kits - 57S-2001 K&N Performance Air Intake System, BMW 2-3-4 SERIES N20 ENGINE, '13-16](http://shadystreetstyling.com/cdn/shop/files/KN57S-2001-K-N-23858727387223.jpg?v=1791429753&width=1946)
![[K&N] Intake Kits - 57S-2001 K&N Performance Air Intake System, BMW 2-3-4 SERIES N20 ENGINE, '13-16](http://shadystreetstyling.com/cdn/shop/files/57S-2001_Exp_1.webp?v=1791429754&width=1946)
![[K&N] Intake Kits - 57S-2001 K&N Performance Air Intake System, BMW 2-3-4 SERIES N20 ENGINE, '13-16](http://shadystreetstyling.com/cdn/shop/files/57S-2001_engine01.webp?v=1791429753&width=1946)
![[K&N] Intake Kits - 57S-2001 K&N Performance Air Intake System, BMW 2-3-4 SERIES N20 ENGINE, '13-16](http://shadystreetstyling.com/cdn/shop/files/KN57S-2001-K-N-23858727387223.jpg?v=1791429753&width=1445)
![[K&N] Intake Kits - 57S-2001 K&N Performance Air Intake System, BMW 2-3-4 SERIES N20 ENGINE, '13-16](http://shadystreetstyling.com/cdn/shop/files/57S-2001_Exp_1.webp?v=1791429754&width=1445)
![[K&N] Intake Kits - 57S-2001 K&N Performance Air Intake System, BMW 2-3-4 SERIES N20 ENGINE, '13-16](http://shadystreetstyling.com/cdn/shop/files/57S-2001_engine01.webp?v=1791429753&width=1445)