I don't have a muffler, just a tip from a diesel exhaust. It isn't too loud, but it's nice and deep. I picked mine up from Pick-A-Part for $5+the $10 for the pipe. Pretty cheap.
1984 Ford Ranger Reg. Cab 2.0L 4SPD 2WD 3.73 8.88 Rear End, No cat 2 1/4 exhaust piped to side exit Diesel tip