I installed the BMW PE on my BMW E93 and love it. My brother has a Shelby Cobra replica and we both got on it and he could hear my PE over the sound of his side pipes. He said it was loud and sounded awesome.
@Skhmund, check on ebay motors, I bought mine for $1124 shipped.
2016 BMW M4 Convertible(F83).
2007 Dodge Charger SRT8 "SuperBee"
2012 Dodge Charger SRT8 (Wife's Car)