I had a Raptor, 2 1/2" turbo style muffler, welded on, by a local shop. Sounds real nice. Deep tone(at idle, inside truck), but not loud. Driving, is tolerable and you can hear radio and passengers voices, fine. Outside, sounds, like a stock, vintage muscle car. My 2000 XLT 4.6l has 4 converters, they keep the noise down. The mufflers are sold at Advance Auto for $30. The muffler shop welded it on for $25