Stage One BMW Speaker Upgrade for E84 X1 with Standard Hi-Fi/Premium Top Hifi F15 While coils do not increase

While coils do not increase horsepower unless the coil they are replacing are not doing their job the factory coils are lacking in proper output so much that all cars tested (stock or heavily modified) gain 20+ whp and 20+ wtq

dampened designs eliminate the possibilities of material resonance in the operating range which can created unwanted and undesired sounds while listening to music

This pump can support up to 575whp (Rated for 500whp on 100% E85) and is drop in ready just like the OEM fuel pump

Some items used and/or installed by KIESMOTORSPORTS may void portions of your vehicle’s factory warranty

- 10AN Male Flare Connection

Stage One BMW Speaker Upgrade for E84 X1 with Standard Hi-Fi/Premium Top Hifi F15 While coils do not increaseGET 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