we ran one on the race car all year, what kind of car is this going on and what are the goals of it, the purpose of the billet wheel line is so the turbos meet the limit of certain class rules, for example the garret 42r is 69.7mm comp wheel, for our class its a 72mm limit, so precision came out with the billet wheel 4272 which is a 42r with a billet 71.90 wheel on it, make sense lol?