I have a stock nitro x-cellerator, and i was wondering wuts the most important thing to buy for it. Not for looks but for performance and such.

I really think the stock front axles suck. They bend pretty easily. Now I did modify my truck some and now run Losi XXX NT front titanium axles and Caster blocks. Now on our brutal track I don't ever bend them anymore. I think another good modification is useing the XXX-NT plastic rear 1 degree toe in blocks. They hold up better than the stock rear blocks. You do need to drill the holes some for the and need to use some Losi hinge pins but it is still a very easy modification.