Hmmm, that is good to know but was looking for a more precise dB gain.
Originally Posted by pharding
1+ bar on Verizon. It works quite well.
2015 M3 - Mineral White, Sonoma, Exec, LED, Adaptive Suspension, HK, 19" Light Alloy, 6MT ED 7/7/15 - Adrian
2013 535i - Space Grey, Biege, M-SPort, Premium, Tech, Cold Weather, Luxury Seating, PDC, 6MT ED-10/11/2012 - PCD - Greg Poland