J's Performance, Inc., in Dubuque, IA, has provided premium auto repair and performance work services to the area for more than 10 years. We offer services for suspensions, brakes, custom exhausts, air conditioning, fuel systems, engine diagnostics and more. We also install auto accessories like running boards, Tonneau covers, WeatherTech floor mats and mudflaps. We do it all! Give J's Performance, Inc. in Dubuque a call today for all of your auto repair and diesel performance needs.