Had some friends with Renegades look at the pn# on their mufflers.. They match what I have on my compass. So this means my assumption was right and they share the same muffler, and the mid pipe on the compass may only be a few inches longer to make up for the longer chassis. I'm probably going to order up the Magnaflow 19324 kit and see for sure. I'll also confirm the pipe diameter and if all goes well I'll pass everything off to Magnaflow and see if they'll make a compass specific kit.
2018 Jeep Compass Trailhawk (GCM)