hey distress
audleys are great I bet you will like yours
the silver green motor is a motor that tin racers (
www.tinracers.com) its rated to go at 54km/h with all the other hopups but it doent really go that fast on the ground
relays are small electrical devices that open and close a switch with electricity allowing more amount of current to go to the motor as well as more voltage it does the same this as mosfits do on a bit
tin racers also cells those
check out the website I bought a bunch of parts from them
I can get the black red motors for cheaper and may be able to sell some
thats what I have in my car now
its awaiting relays and a gearbox wheel kit
if you have any more questions just ask
nick