Russ' Garage was the go-to place for this project. Thanks to a fellow enthusiast who had just installed a Perrin Exhaust onto his BRZ, I was able to nab a stock BRZ catback exhaust and start working with that. Russ laid things out and checked to see what could stay and what would need to be modified and got a simple solution set up. The system would retain the stock Impreza mid-pipe up until a few inches ahead of where it clears the rear suspension. From there, we cut the tail end of the BRZ mid-pipe to pair with the stock Impreza mid-pipe. Then the hangers on the BRZ muffler linked flawlessly into the 5-Door Impreza's existing setup (like it was made for something like this) and buttoned the rest of the exhaust up!
This exhaust certainly looks the part. It's integrated into the bumper, so not only does it look more like part of the car, but it's also brought back my stock ground clearance, which is helpful when I want to be a little more adventurous. Thanks to the smaller diameter piping in the BRZ exhaust, there's no loss in power or low-end torque. As a result, fuel economy has returned and I easily average 33mpg combined city/highway driving. Cabin noise is nice and quiet again, so my passengers are thankful for that. Overall, there's a long list of things I enjoy about this setup as it just makes more sense for a car like this.