The Injen SP Short Ram Air Intake System for your 1997-1999 BMW 323i is a great way to increase horsepower and torque gains by replacing your restricted factory air intake.

The Injen SP Short Ram Air Intake System for your 1997-1999 BMW 323i is a great way to increase horsepower and torque gains by replacing your restricted factory air intake.

The GruppeM Super Cleaner Intake BMW 323i M52 | 328i E36 1995-1999 for your 1996-1998 BMW 323i is a great way to increase horsepower and torque gains by replacing your restricted factory air intake.

The GruppeM Super Cleaner Intake BMW 320i | 323i | 325i | 328i E46 1999-2005 for your 1999-2000 BMW 323i is a great way to increase horsepower and torque gains by replacing your restricted factory air intake.

The GruppeM Carbon Fiber Ram Air Intake System BMW 323i | 325i | 330i E90/E91/E92/E93 05-10 for your 2005-2010 BMW 323i is a great way to increase horsepower and torque gains by replacing your restricted factory air intake.

The GruppeM Carbon Fiber Ram Air Intake System BMW 320i | 323i | 325i |328i E46 99-05 for your 1999-2002 BMW 323i is a great way to increase horsepower and torque gains by replacing your restricted factory air intake.