I recently bought the Solo Performance Exhaust system for my Charger and I couldn't be happier. It finally makes the car sound like a proper muscle car. It has a deep idle tone and an aggresive growl when you stomp on it. It truly is an on demand system and it quiets down under a normal cruise. I daily drive the car and there is virtually zero drone with this system. I can't say I have anything bad to say about Solo Performance.