Name: Master Muffler Brake Complete Auto Care. Descripton:Master Muffler is Utah’s leader in downtown Salt Lake auto repair, offering services such as muffler repair and replacement, brakes, preventive maintenance, engine repair and tune-ups. Contact us today for a quote. The Master Muffler Salt Lake City location is located on Main Street and 690 South. Master Muffler is your downtown Salt Lake City brake and muffler repair specialist.