Purple?
 

How much does it cost and where to get it? My is crazy fast now but how much faster can they go?

Hmmm..I feel like I've said this before ;) , its a new upgrade, costs about 10 big ones, its called the 1/4 Mile kit, comes with a 2F2F body shell (you..might wanna..paint that..), the new motor and gearing, and some slicks. If you thought the red motor was fast, prepare to pick your jaw up off the floor. It hauls (and its still controllable!)

Cool! What is the body?

The EVO VIII (Yeah, VIIII.) painted like the VII from the movie, or the Skyline. Those are the two options. I can't stand the 2F2F styled bodies so I usually just use them like a clear Bit shell and customize. You still get the new motor and gearing/tires no matter which body style you are forced to choose.

Cool! I already have those bodies so I don't really care!