Had this system installed on my 2013 Ram RT, 5.7 hemi and couldn't be happier. My stock truck looks amazing, but sounded like a Celica. Not anymore.... The sound at idle is low and mellow, not anyway loud or obnoxious. Under throttle it is magical... aggressive,deep,and very high-end sports car sounding with no drone. Paired with an K&N filter, mine even shifts smoother now. Make sure you disconnect the battery.... computer must re-set to get full potential.