Whether you need to get your muffler serviced, a custom exhaust system designed and installed or a help passing a smog test, let D and D Muffler and our experienced team help. We proudly serve LA County, Kern County and Antelope Valley.Maintain the power and fuel efficiency of your vehicle with regular service from our exhaust repair shop. Servicing everything from lawnmowers to cars, SUVs and semi-trucks, we'll make sure your exhaust system is operating at 100 .