Here's some pics and a short video of my CT5. The stock .15 engine was swapped out for a Cen .28 SH from a Matrix. Differential is stock, I have drift tires on it though....but with this engine I can slide easily with the stock racing tires.
Stock CT5 on the left; the car on the right has the .28 SH engine swap. ~1.5hp vs. 3.6 hp