smarten up your maxx fast
Out of every thing i have done to my maxx the integy MSR4 shocks and pro line maxx masher tires were the most helpful. i run an Mach .25 BB and i love it but you will have to beef up you powertrain if you want to go BB. I have all of robinson racing drive parts in my truck. spur,top shaft,forward and rev,double disk slipper clutch,bell,brake disk,beefer out-drives and some cv shafts
but start with shocks first, it will save you some time