In business for more than 8 years, Speedway Smog Center is a provider of a variety of automobile smog control inspection services. Located in Modesto, Calif., the firm is one of the leading smog centers of the area. It offers discounts to clients with various cards and coupons, including Hotel Club, Octopus Travel, Travelocity, Holiday Inn, to name a few. Speedway Smog Center performs various mechanical repairs, including normal tune-ups, brake/tire work, state/emission inspections, technical electrical problems and engine overhauls.