Stage One BMW Speaker Upgrade for E63/E64 Coupe/Convertible with Standard Hi-Fi BMW-F2X 135i-2020 We utilize your factory amplifier

We utilize your factory amplifier to generate amazing bass response in your BMW

No more disconnecting a ground or flashing between maps on your port injection controller

(Use of supplemental injector controller is required)

bootmod3 calibrates the factory vehicle modules over the OBD port in a matter of minutes in the convenience of your driveway or anywhere internet access is available

a one time purchase for all maps

Stage One BMW Speaker Upgrade for E63/E64 Coupe/Convertible with Standard Hi-Fi BMW-F2X 135i-2020 We utilize your factory amplifierGET 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