Stage One BMW Speaker Upgrade for F44 with Standard Hi-Fi F31 and V8 available)

and V8 available)

Build the ultimate tune for your S63tu4 powered vehicle and go from stock to full race calibration

Horsepower Supported Pump Gas: 850

Datalogging hundreds of advanced diagnostic channels

and utilizes batch firing (all injectors fire at the same time)

Stage One BMW Speaker Upgrade for F44 with Standard Hi-Fi F31 and V8 available)GET 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