I'm wondering if anyone on here has ever tried installing an OEM muffler with an aftermarket cat-back exhaust system. I have the MBRP 3" system on my 2017 Fiesta ST and as many on this site have mentioned the drone is pretty bad. I'm looking for a way to make it quieter (ideally as quiet as the factory exhaust) and am wondering if adding a factory muffler would be a good fix. For those unfamiliar, the MBRP cat-back on my car consists of a straight-through rear muffler and mandrel-bent 3" tubing. Between the inconsistent tubing sizes and the design of the MBRP rear muffler, I have no idea if removing the mandrel-bent tubing and attaching the OEM muffler to this system would work well or lead to any issues. The alternative, of course, would be to replace the cat-back altogether, but I'm trying to explore more cost-effective solutions. I don't know very much about any of this at all (I'm just a girl trying to deal with the aftermath of her dad's differing taste in car exhausts), so if anyone had any thoughts they could share, it would be greatly appreciated!!