Stage One BMW Speaker Upgrade for F36 with Harman Kardon F25/26 X3/X4 35i That means amazing bass response

That means amazing bass response without replacing your amplifier

Stage 2 91 octane: up to 16% HP / 28% TQ

INCLUDES EVERYTHING YOU NEED FOR CRYSTAL CLEAR SOUND

we've designed our woofers using technologies like oversized neodymium magnets and lightweight poly cone to maximize every watt of power they generate and translate that into raw output

fuel pressures are more stable

Stage One BMW Speaker Upgrade for F36 with Harman Kardon F25/26 X3/X4 35i That means amazing bass responseGET 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