I bought a used Invidia Q300 Catback Exhaust for my 2017 WRX and the Vibrant 1458 (3" ID) works great. I also have a 1457 (2.5" ID) for the downpipe mufflers/resonators. Not the highest quality, the Grimmspeed 2x gasket is thick, but about half the price, feels better than generics at auto parts stores, and no leaks so far after a few weeks of driving the car.