bugs......... excelhobby will supply all your parts man. they are in new york or new jersey somewhere.any engine from .12 to .15 will fit. anything bigger will rip that poor lil ******* apart. get new shocks or used ones, just better. use threadlock on all screws metal on metal.get a different radio/receiver(used e-bay). grease your diffs, get bearings if you wanna spend a lil extra. buy a rechargeable glow plug ingniter. make sure you let your kid drive it. cheers man, these things are like crack cocaine man your gonna be addicted.