Stage One BMW Speaker Upgrade for E63/E64 Coupe/Convertible with Standard Hi-Fi Performance and silk composite tweeters

and silk composite tweeters

steering angle sensors etc

NOTE: Precision Raceworks LLC does not permit this part to be used for elimination or tampering with emission systems in any way

  The Precision Raceworks high pressure fuel pump is supported by MHD

Datalogging hundreds of diagnostic channels with the highest throughput and sample rates available

Stage One BMW Speaker Upgrade for E63/E64 Coupe/Convertible with Standard Hi-Fi Performance and silk composite tweetersGET 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