BMW 3 series, E46 coupe (1999-2006) speaker adapter (165 mm).
Amazon.com: Front Speaker Adapter Spacer Rings Fits 99-05 BMW E46 3 Series ( Coupe Only)- SAK015_55-1 Pair : Automotive
BMW OEM E46 M3 Coupe Speaker Harmon Kardon Speakers 6920857 Amplifier 6920892 | eBay
HOW TO REMOVE AND REPLACE FRONT DOOR SPEAKER ON BMW E46 - YouTube
STL file BMW E46 coupe speaker mount for Pioneer TS-170Ci and TS-1720F・3D printable design to download・Cults
E46 coupe speaker upgrade. | BMW Forums : BimmerForums
BMW E46 3 Series 1999-2006 Audio System – Bavsound
BMW OEM E46 M3 Coupe Speaker Harmon Kardon Speakers 6920857 Amplifier 6920892 | eBay
E46 Speaker Upgrade Front and Rear [DIY]
Speaker Adapter For 1999-2006 Bmw 3 Series E46 130mm 5.25" Front Rear Door Adaptors Kit Rings Plate - Fascias - AliExpress
BMW E46 325Ci M54 2.5L Speakers - ECS Tuning
BMW 3 Series E46 Harman Kardon (or non-HK) Speaker UPGRADE - 10 or 12 speakers | eBay
DIY: E46 M3 Front/Rear 6.5" Install | E46 Fanatics Forum
Amazon.com: Front Speaker Adapter Spacer Rings Fits 99-05 BMW E46 3 Series ( Coupe Only)- SAK015_55-1 Pair : Automotive
HOW TO REMOVE AND REPLACE FRONT DOOR SPEAKER ON BMW E46 CONVERTIBLE COUPE | HOW TO REMOVE AND REPLACE FRONT DOOR SPEAKER ON BMW E46 316ci 318ci 320ci 323ci 325ci 328ci 330ci