Stage One BMW Speaker Upgrade for F25 X3 with Harman Kardon TIRES4QTY We utilize your factory amplifier

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

Carbon Core: Yes

We include new genuine Bosch Motorsport injectors which are flow matched both static and dynamic by an outside lab to industry leading requirements

Gasket Type: OEM Spec manifold gaskets (commonly found in BMW N54 applications)

This line set is ready for adding your own ethanol sensor

Stage One BMW Speaker Upgrade for F25 X3 with Harman Kardon TIRES4QTY 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