Drivetrain suggestions

Drive shafts should be able to break from over torque/too much power. The clutch on the cars is way too lenient and should be more easy to stall the vehicle when letting the clutch out.

 

They already do

 

That's cool, but I don't think it's possible to actually split one in half, and when they do break it's not visually represented as much, needs to be some debris

 

They should be able to break at a joint point from too much power and or a hard launch

 

and maybe vibration driveshaft's

 

When they break they disappear.