Originally Posted by ShaunMac

The original Cyclone is still a very competitive car. The weakest link was the diff design. The new Pro-Spec diff took care of that problem.

Unless you just need a new kit, I would just upgrade to the Pro-Spec diff and maybe the WCE towers for more adjustability. If you are running 17.5 class you could get the 18T pulleys and belts to lower the internal gear ratio a bit.

Set-ups for the TC, WCE and Orginal Cyclones will be very close. The basic geometry of the car hasn't changed over the years. They have just added the ability to make finer adjustments to better suit track conditions.