• Adapters enable you to upgrade your vehicle specific factory speakers with aftermarket speaker into the factory locations
• Fits most 5.25” aftermarket speakers with a maximum top mount diameter of 5 1/16" (129mm)
• 1999 to 2010 BMW 3-Series vehicles Front Doors
• High-grade ABS materials precision designed for a gapless fit between the speaker and the adapter providing a long lasting, secure fit
• Not Compatible with Oversize 6.5" or 6.75" Speakers

See Measurements Image to verify that your speakers will fit in these adapters