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Ships within 48 hours · Estimated delivery Sep 15 - Sep 20
 900cc @ 4bar (58
even for a novice
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Vehicle Fitment
Stage One BMW Speaker Upgrade for F34 with Harman Kardon flash tune  900cc @ 4bar (58GET UNBELIEVABLE, CRYSTAL CLEAR SOUND. JUST BY REPLACING YOUR BMW'S SPEAKERS We took your factory BMW speakers and re engineered our upgrade for one thing: clarity. So you can simply swap your original speakers for ours without changing anything else in your audio system, and the result is smooth, natural, yet unbelievably detailed reproduction of your favorite music. PLAY YOUR MUSIC LOUDER. AND ENJOY EVERY NOTE: We engineered the Stage One speakers
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