Stage One BMW Speaker Upgrade for F44 Gran Coupe with Harman Kardon 7 SERIES and many other factors for

and many other factors for specific horsepower expectations on your vehicle talk with your tuner

Plug & Play wiring: Yes

Built in Ethanol Content Analyzer

PR Big Bore ("Stage 2")

Advertised Flow 950cc: 750cc @ 43

Stage One BMW Speaker Upgrade for F44 Gran Coupe with Harman Kardon 7 SERIES and many other factors forGET 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