The IMCA has a rule in its Modified and Stock Car classes that has been in effect for many years now, and while racers have different opinions of it, there is no denying that it has the intended effect of making racers keep a close eye on the checkbook. That rule is, of course, the IMCA's claimer rule, and the best part about it is its simplicity. Essentially, the IMCA lets you run just about anything you want, but anyone on the track who finished below you can claim your engine for $525 or the engine in their car. (Usually, the team getting claimed has the choice of which they want.)