K&N Air Intake 57 & 63-Series for 1999-2006 BMW 3-Series/M3 [E46] (57-1001/57-1002/57-1003)
KN 57I-1000 Bmw e46 - air filter sound - YouTube
Short Ram Engine Air Intake Elbow Filter BMW E46 K&N Filters | eBay
Amazon.com: K&N Premium Oil Filter:Designed to Protect your Engine: Compatible with Select 1995-2009 BMW/LAND ROVER/VOLVO/FORD Vehicle Models (See Product Description for Full List of Compatible Vehicles),PS-7007 : Automotive
57-1001 - K&N FIPK Performance Gen II Intake System - E46 330i/Ci/xi M54 3.0L | Turner Motorsport
K&N Filter with Generic Cold Air Intake kit For 99-05 BMW E46 323/325/328/330 I6 | eBay