A Dianetic racing car team has been active in Switzerland over the last couple of years. You can check out their detailed web site (in French) here: Dianetics Racing - tout sur les courses de voiture.
It seems now that one Kenton Gray is seeking to replicate the experience at the NASCAR level. I don't know if that team has a web site yet.
ABC News: Scientology Goes NASCAR With Dianetics Race Car:
The venture is called "The Dianetics Racing Team," named after the best-selling self-help book written by the movement's founder, science fiction writer L. Ron Hubbard.
Kenton Gray, a California race-car driver who has said Dianetics helped his life and driving performance, will head up the Dianetics team.
"It's markedly improved my focus and my consistency," said Gray in a statement. "Through Dianetics I've handled stress and increased my performance and ability to compete -- both on the track and in life."
Gray finished first in five regional races over the last year and ranked in the Top 5 in dozens of other races.
The team is hoping to spread messages of Scientology through weekly tours on the track, although it will compete on the local circuit, not NASCAR's premiere national events.[...]
NASCAR did not address the idea that it now has a controversial new participant in its very successful money machine.
"We're not going to comment on the sponsors that the local weekly tracks secure," Kerry Tharp of NASCAR.