Main Line Motorsport

308 National Rd
Exton, PA 19341 US
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Main Line Motorsport is a fully equipped service center for your daily driver, weekend cruiser, or full on race car. Quality is our priority, focusing specifically on your vehicle without the flat rate quotas of dealerships and apprentice technicians of most shops. Whether it's a basic oil change on your Macan, a corner balance and race alignment on your 991 cup, or a full SMG to 6 speed swap on your E46 M3, MLM will take the time to focus on your needs.


  • Free Wifi
  • After Hours Drop-Off
  • Magazines
  • Weekend Hours
  • Customer Lounge
  • Transit Accessible
  • Walkable Area

Meet Our Owner

  • Eric Magnussen


    Owner Eric Magnussen is a Porsche Gold Master Certified Technician with years of Porsche dealer experience after specializing in BMW at a European independent. Passionate about motorsports and active in racing and car club communities such as BMWCCA, PCA, NASA, SCCA, Global Time Attack, and Gridlife. Many race wins, track records, and championships in a GTS3, ST3, Cmod BMW M3. Experienced driving instructor and coach.


  • I am very impressed with the quality of work performed, the attention to detail, and the amazing willingness to work with me on all of my race car's special 'quirks' and needs! The car will definitely be going back to Eric to do the final touches, alignment, balancing, etc. before I put it on the track in the spring! Thanks!

    Tom P.
  • Main Line Motorsport provides top notch service for BMWs and Porsches. The team at MLM is highly skilled, detail oriented, and strives to deliver excellence in everything they do. Whether you need service on your daily driver or help setting up a race car, you can count on MLM.

    Sam H.

Awards & Affiliations

ASE CertifiedASE Certified