smoke balls or smoke emitters (used for vaccum testing, etc).. work dandy.. you'll just have to create some sort of box or something they sit in in front of your rear shock tower, that allows for smoke to escape out the back, and not elsewhere.. you will need to have the bottom well covered, due to the heat either of these items put out... but, USE AT YOUR OWN RISK!!!!!!

we do it all the time, and provides just the PERFECT effect!!!

sorry, no tires squeeling..

these aren't 1:1 scale cars we're talking about...

merely hobby-styled toys