The company's specialty and only currently-produced vehicle is the S3 Roadster, a kit-car copy of the Lotus Super 7.
The founder and owner of the company is John Watson, a descendant of pioneering race car driver Tim Birkin.
The first shipment of completed S3 Roadsters were delivered directly to be sold at Lotus car dealerships.
Further developments to the car include using an independent rear suspension as opposed to the previously used live axle.
As of July 2013 Birkin has added a wide body version, this car is approximately 4" wider and 3" longer.