[Stanly]

The NTC3 RTR (Ready To Run) can go 45mph stock, but you could get them goin' past 50mph or maybe even 60mph with a better engine (not saying the stock one is bad or any thing) and a 2 speed.
The kit version already comes with a 2 speed, but you have to buy an engine and a radio.
Don't be fooled buy other cars when thet say they can go 60mph stock, they can but the handleing will *SUCK* and it will have a hard time with the engine. The NTC3 can handle any small block engine on todays market!

As for the buggy. (I think your talkin' about the smaller truck?) the RC10GT RTR speed is in the mid-thrity's.
This is mainly a race truck, but its as tuff as nails, so fell free to bash it.

The stock engine is plenty to have fun and race with, in both cars, so you won't be in any rush to replace them. Fell free to ask any more ?'s.