Originally Posted by Kevin K

The speed 12 has more down force then the 12B my car feels more planted when I run it. The 12B is stable but feels more nimble when changing direction. I dont feel that one has more steering over the other just the 12B is faster in stock b/c it has less down force. Both bodies have a place and time to be used. The speed 12 is mainly a mod or lower traction body and the 12B is for stock and high traction type body. The speed 12B feels alot like the Parma Speed 8 but I get the feeling that its more stable at higher speeds or in sweepers. Or you can try both bodies and see for yourself how they feel....they are cheap enough. I hope this helps......