Read in these forums that Clayfighter had limited time run hard to find race game for like the SNES their was link to youtube (missed it) but has been removed.
Clayfighter is such a loved game if they had had made one people would know, and they would speak. Even if the game svcked would be easy to find info on but Wikipedia does not list (although they can miss lots of stuff) & general web search yields no response no hint of it anywhere, seemed that it was rube when it was read into but stranger things have happened & the idea is gold nothing short of it.

I wasn't aware that there was a Clayfighter racing game. There might have been one in development, but if so, it was never released (again, as far as I can tell).

Mobygames doesn't list anything in the Clay Fighter series.

http://www.mobygames.com/game-group/clay-fighter-series

(I wouldn't be too surprised if there was such a thing... we've done way more games than I can keep track of.)

Any word on the current ClayFighter game that's being developed for DSiWare?