OK , this is coming from first hand experience i ran the stock chassis at SOCAL RACEWAY , were they have a banked track the chassis would roll and lift the inside tire and spin out coming off the banking..its a recuring problem for so cal racers..tosolini and i changed the chassis between rounds didnt change anything else the car was BOMB ..Now you tell me WHAT CHASSIS is doing to NOT make traction, its not about making traction anymore its about making sure the shocks are doing there job ,,,DUDE its 4 wheel drive how much more traction due you need...the clock dont lie...average lap times befor 11.0 w/ 3.9 chassis low 10s and thats what im talking about...you should do your own testing and dont rely on what others THINK ....it works every were indoor / outside in the dirtiest parking lots... my 2 cents ...charlie albrecht