LiPo LiPo LiPo!

[JOHNNYMAXXIMA]

See, now that's what I'm talkin about! Keep talking about something long enough and sombody's bound to come up with something better.:004:
My main concerne is top speed, I don't care about run time at all, so if 6XL is the way to go, then I'm all for it.
My brother has an 18MT that does almost 55mph and he says my truck would never beat his, so if I could embarress him with my Maxx that would be great!
My truck is weighing in on the higher part of 14lbs. as it sits, so I'm guessing that LiPo's will take off about 2lbs. roughly? Might have to put her on a diet to get the weight down a little more.
So is there anything faster than the dual 6XL's and 5s' that would still work with the 9920, or am I tapped out as far as speed goes with the 6XL?
Thanks.