The Stinger exhaust swap is straight forward, probably easier than some other cars i have done. I did mine solo, on jack stands in my garage. There is a video on YouTube that is very good. The only thing i did that wasn't in the video was loosen one downpipe mounting bracket to get the CAT to rotate just a little to line up with the mid pipe. Weight savings.... drum roll... 4.5 lbs! The mufflers are a little lighter and the mid pipe a little heavier. Basically a wash. Fit and finish and quality are excellent. On start up, idle, and rev with no load, the exhaust is pretty tame. Before my first drive i thought it was going to be too quiet. Under load it gets louder and under WOT it sounds like a race car. Seems perfect to me. It is mostly drone free. I only noticed a bit on the highway @ 1800 RPM once. I could see it getting a little loud if you are lugging up a hill at low RPM. Cruising under light load at lower highway speeds it is pretty quiet. Start up and idol are quieter than my Stock WRX was, which was loud (just at idol). But while driving the Ark is louder than the WRX which is sporty but not loud overall. The Ark on the Stinger does sound very similar to the sport exhaust on my GLA 45 AMG, which is very loud for a OEM exhaust. The exhaust totally changes the character of the car so beware. Stock it is sports/ luxury almost Lexus like quietness. With the exhaust it sounds like a Maserati or Ferrari. Not quite that aggressive but heading that way. With the exhaust you don't need the fake engine sound anymore. I turned that down in custom.