Review on MagnaFlow Exhaust Products 13269 Muffler by Oso Mears

The muffler is actually a Magnaflow muffler although it is not stamped. Produces great sound with increased exhaust flow as advertised. This particular muffler resonates slightly on my 4.8 liter Sierra from 1800-2000 rpm but isn't as bad as the Flowmaster 40 series. Produces a clean, raspy sound that's not overly loud, but definitely more powerful than stock. Overall great quality, great design and great silencer!