Over 52 years experience in Porsche service and repair

Let's get to work

News and Events

Upcoming Events

We are happy to be able to partner with many well known Porsche enthusiast groups, such as the Porsche Club of America, Chesapeake Region. Partnerships such as this allow us to grow as a community while expanding the network of Baltimore area Porsche owners. If you are not already a member of an organization such as the P.C.A., we highly recommend joining! By doing so you will be able to stay up to date on local and national Porsche events.

Come and see us after Hunt Valley Horsepower on most sunny Saturdays! Contact Us for more information.


  • Porsche Factory Scheduled Maintenance
  • Complete Porsche Engine Rebuilds
  • Suspension Rebuilds
  • Alignment & Lowering
  • Carburetor Tuning & Rebuilding
  • Mechanical Fuel Injection (MFI) Tuning and Rebuilding
  • SuperFlow 600 Flowbench
  • Machine Shop On-Site For Custom Fabrication
  • Paintless small dent removal
  • Routine Porsche Service & Maintenance
  • Transmission Rebuilds
  • Brake Systems
  • Exhaust Systems
  • Electrical Systems
  • Pre-Purchase Inspections (PPI's)
  • Safety Tech Inspections For Track Days & Competition Racing
  • Porsche Parts Sourcing For Rare Vintage Items
  • Alignments
  • Ultrasonic parts cleaning service
  • Performance suspension and brake upgrades
  • Full Restorations and Partial Refurbishment available

We Use

About Us


With over 50+ years experience in Porsche service and repair, Ralph Simmers began his automotive career with Porsche at the age of 21 with Stuttgart Import Corporation in Towson, MD. Stuttgart Import was one of the first Porsche dealers in the country. Ralph was fortunate to crew as mechanic for various race teams, including Bruce "King Carrera" Jennings and the fabled Toad Hall Racing during the 1969, 1970 and 1971 campaigns at Sebring and Daytona. Ralph's Auto Service opened as an independent Porsche shop in 1971.


In 2015, we moved to a 7,500 sq. ft. facility, with over three times more shop space. We thought this would provide ample space for our growing client base... little did we know we would be moving again in just 5 short years. In 2020, we moved to a world class, 25,000 sq. ft. facility in Hampstead, which was designed by a national architecture firm. We have the latest diagnostic tools, an ultrasonic parts cleaner, distributor dyno, flow bench, horizontal lathe, Bridgeport and 5 axis C&C machine. This expansion has occurred in order to keep up with the growing demand for quality independent Porsche service in the 5 state mid-Atlantic region.

We take pride in servicing everything Porsche, including the earliest 356 models, Speedsters, 356 A/B/C/SC, 912, 911, 911 Turbo, 914, 914-6, 924, 944, 944 Turbo, 968, 964, 993, 996, 997, 991, Carrera GT, 918, Boxsters, Caymans, Panameras, Cayennes, and Macans. Ralph's has a certified Porsche Gold Master Technician on staff to supervise and oversee critical jobs. Your Porsche will be serviced using OEM parts whenever possible.

We also provide detailed preparation for vintage rallies, track days, and competition motorsports. We have grown over the years through hard work, courteous service, honesty and impeccable quality that only five decades of experience can deliver.


[email protected]


1900 B Hanover Pike

Hampstead, Maryland, 21074

If you'd like to talk about the shop or request a quote, feel free to contact us.


Monday - Friday (Wuhan Virus modified hours)

9:00am - 5:00pm

Service on Saturdays by appointment only