A four part special is current airing in the UK - Sunday 6.30pm channel4
http://www.channel4.com/science/microsites/S/scrapheap/scrappy/
This manic four-part series takes five top Scrapheap teams and gives them
five weeks to build five (yes, five) freakish, monster, mutant motors at
home. These basic rigs are then taken on a fantastic, hairy race across
England, Scotland and Wales.
Stopping at three special locations, the teams have a local scrapyard and
eight hours to get their hands dirty as they bish, bosh and bash their
vehicles into a range of lunatic adaptations to deal with a set of tasty
challenges. Fasten your seatbelts, the Scrappy Races are on.