06/23/2026
Welcome EFI Motorsport as a official sponsor!
Over the past couple of decades, founder Marc Swanson has built Somersworth, NH based EFI Motorsport into one of the country’s premier vintage Audi performance and repair specialists.
From their 13,000-square-foot facility EFI offers a wide range of services from dealer-alternative maintenance, diagnostics, and repair, to race car electronics fabrication and tuning on their Mustang MD500 AWD Dyno.
EFI offers a wide range of street and race car retail sales from repair parts to high-quality motorsports electronics and performance parts from brands such as Maxx ECU, Link, Haltech, Garrett, Turbosmart, and others. If it makes your car fast, EFI can help you.
Beyond all of that, EFI is also the master USA distributor for MapEV, the ultimate performance solution for the Audi E-tron GT and Porsche Taycan model lines offering supercar levels of performance with a safe warranty-friendly module upgrade (hard to dislike 4-digit power numbers and 9-second quarter-mile times from otherwise completely stock daily-driven street cars).
So if your car needs diagnostics and repair, specialty parts you just can’t find, or a tune to finish the build, reach out to Marc and his team to get your next project finished!