xtreme concepts inc. racing, also known as xci racing, is an american professional stock car racing team owned by landon ash and is a subsidiary of xtreme concepts inc. the team competes part-time in the monster energy nascar cup series, fielding the no. 81 toyota camry for jeffrey earnhardt and part-time in the nascar xfinity series, fielding the no. 81 toyota supra for earnhardt and erik jones as well. xci racing has a technical alliance with joe gibbs racing.