X1 Boston Gift Certificate Complete Racing Package for two (2). 15 Laps on the Country or City Track. Use of helmet, professional racing uniform, neck brace, and balaclava. Drivers Licence good for that day. On our European-style tracks, X1 Boston offers the ultimate kart racing experience from open racing sessions and private events to competitive leagues and endurance races that push you to perform your best. Our City Course and Country Course offer plenty of racing thrills, sharp turns, a corkscrew and tunnel, rolling hills and off-camber corners.