UwU just installed the Goodwin Racing Roadster sport RACE muffler on the Miata, and I'm absolutely in love with the way she sounds now. It's not crazy loud or obnoxious, has a very sporty growl now and as I let off the gas when at higher RPMs, this new backbox allows for burbles and pops to be heard. Plus the stock muffler weighed 30 lbs, this one weights 8 lbs. Worth the 300 bucks! Simple installation, I did it in the parking lot in under an hour. Hardest part was removing the rubber exhaust hangers!