Hey dude, I can help a little...
I race a Traxxas Rustler that was originally completely stock (xl-5) as is yours currently. Now i've got a ton of $ into it...opps!
A lot of my upgrades came directly from traxxas support at www.buytraxxas.com
. I'd really recommend going to your local shop to get all of your hop ups...It's just easier and it supports the local hobby shops & activities.
My upgrades include:
Adjustible Front & Rear Camber links (stock on new VXL) -absolute must have
XL Big Bore Shocks front and rear
5x11 ball bearings all the way around- Huge difference!!
5x11 front and rear cariers - I have alum. for both and custom toe in for rear
Fastlanemachines.com extended front and rear arms made out of alum.- extends width by about an inch in the rear and 3/4 in the front. - drawback...you have to custom make front and rear camber rods...i'm working on some new adj. rods soon. for now they work fine.
GREAT UPGRADE: VXL MOTOR AND SPEED CONTROL
EVEN BETTER:::::3s (3cell) Lipo 11.1v 4000 mah Battery!!!! - it's like putting NOS in your car!!!
...I'm sure there's more but i gotta run for now.
Check out my videos on www.youtube.com