On 3/18/2013 12:54 PM, Bob Engelhardt wrote:
35 lb tungsten "ballast" blocks (race cars): $1877

http://www.stockcarsteel.com/tungsten/

Twice as dense as steel & 50% more than lead, but what a price to pay
for the little space that it saves.
isn't uranium even better? nukes should pay you to haul it away.