EdwardBaker

And I didn't understand, what's the difference between the RB7 & RB7SS. Thanks for the answer.

lexusbest

The RB7SS is for stock racing. It won't hold up a mod motor

OffRoadJunkie

iTrader: (9)

As mentioned, the RB7 is designed for Modified classes. The RB7ss uses lighter components to lighten the buggy and reduce the rotating mass in the driveline. The RB7ss is specifically designed for the 17.5T stock class. You can run a 13.5T motor in it, but the components will wear out faster and, with the RB7ss not having a slipper clutch, acceleration will need to be better controlled with your trigger finger.