Just got through 1000mi break in period (according to Borla) and love the sound. The Challenge: wife and I live in a condo with a concrete parking garage and we share the Stinger...the wife and neighbors can't stand the noise in the morning. Exhaust has been removed from the vehicle and is at the Kia dealer in Bradenton, FL where my Kia tech will install the system on your car at no charge if you can drive it there on a Saturday otherwise I can pack and ship at your cost. Paid $1150 +tax