it primarily all about the tuning... but unless your racing in a tournament, does it really matter? the good thing is that with any traxxas vehicle theres about a billion upgrades. my t-maxx goes about 135 miles per hour right now.. however if the world ever stop spinning, it would be drasticaly dropped to about 50 ish... but hey, who's counting.....

trx 3.3, perf pipe, and motosport intake = faster than a old person in an electric wheelchair

which makes me wonder why some wheelchairs arent nitro....hmmm???