Ive had this mod done for about a year now, and even at low RPM's you can hear them spool up and blow off- ,
one of my Favorite/ Cheapest Mods!!
'13 328i MSport, AW, Black Dakota leather, Premium Pkg, xenons, ///M Perf, side skirts,Front Lip, Fully coded, CF roundels, Matt Black Grillz, Painted reflectors (front & rear) Smoked tail lights, Plazma l.E.D White PY27W front turn signal,trunk spoiler, Matt Black roof, 8K D1S HID,Custom Exhaust,!
Soon: JB4,DP,H&R sports,rear diff,!