BMW 3 SERIES G20 G80 M3 18+ STEALTH SUB SPEAKER ENCLOSURE BOX SOUND BASS 10 12
10" 0.70 cu ft / 12" 1 cu ft + wadding simulates a larger enclosure for deeper bass. 10" Subwoofers best advised for stealth application, 12" Is vehicle/trim dependent - ask. Flush mount subwoofer £5.