Stage One BMW Speaker Upgrade G20/G80 3 Series with Harman Kardon F87 Less heat soak than aftermarket

Less heat soak than aftermarket cast manifolds means proven lower IAT's

Best of all this pump ships completely assembled and ready to install we don’t even have a core charge

To get started

  Each pump comes with flow calibration report showing dynamic test results and pass/fail status of critical functions

Stage One BMW Speaker Upgrade G20/G80 3 Series with Harman Kardon F87 Less heat soak than aftermarketGET 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