Match 2 way 4 " Component speaker upgrade fit BMW 1 series E81 E82 E87 E88
1-series E81 3-door 2004 - 2011 Front door. E87 5-door 2004 - 2011 Front door. E88 Convertible 2004 - 2011 Front door. E82 Coupe 2004 - 2011 Front door. Crossover Separate, 6 dB / 12 dB slope with bandstop filter.