EFI Motorsport,

20 Rescue Lane, Somersworth, NH 03878

"EFI has mounted tires on both my cars now, safe to say they are my main shop for anything I need. They always go above and beyond for you and their pricing is more than fair. Anything you need don’t hesitate to give them a call"

"Professional, efficient, honest, and fun work. Marc and the team at EFI Motorsport did an amazing job to my car with what I would consider a complete white glove service. I shipped my broken 1995.5 Audi S6 avant to EFI from hundreds of miles away and picked it up in perfectly running and driving condition with about 200 more horsepower! The work they do here is truly artisanal. Being a car guy who also runs a shop, I could not be happier with the entire experience. From scheduling delivery/pickup to the care that went into making my car the way I wanted, I would give EFI more than 5 stars if I could. I told them exactly what I wanted: maintenance and power mods that suit my daily driving needs. Marc and the team delivered that exact result as a 100% polished product. They kept me updated every step of the way which made the whole process very transparent and honest. I can't wait to send them my 1985 ur-quattro!"

"We came in to tune our car on the dyno, the team at efi did a great job helping us in the process. Marc is very knowledgeable and experienced."

"So I have a 2016 S3 that I bought a couple months ago at 110k and it needed all kinds of love and they have been nothing shy of exceptional to me and my car. The customer service is incredible along with the work they do here. The owner is there working with the guys and it’s so friendly and comfortable here. They have put in new sensors, new spark plugs, + a plethora of other stuff. I would legit be lost without them with this car. Forever customer here!"

"Great experience all around ! I brought my Audi B8 S4 in to get stage 2+ upgrades Bret and Mark were absolutely amazing. Bret is very knowledgeable on what he does he was there very step of the way , great customer service where they went over and beyond. Best tuning experience I have ever experienced! Definitely will be coming back ."