NX/ShenQiYellow Motor=motor from ShenQi or Rally Racer clone found at KBtoys as well as other places in the US.
Green Gears=from earlier versions of the zz tuner kits that still may be available at some RS stores.
Layman's Tri/Dual=batteries available at Allelectronics.com, they are the NMH-11 packs. Instructions found
here.
Pigtail Cat5=cat 5 antenna mod, wound into a pigtail. Found
here.
Spring Suspension=replacing stabilus bar (white suspension bar) in your car with micro springs. Found
here.
Rare earth magnets=replacing your existing steering magnets. Gives better steering. Available at RS. Mod info
here.
New (Gen3) ZZ PCB=refers to the cars printed circuit board. The newer, the better is general rule of thumb. There's been at least 3 confirmed pcbs, I believe that there is a 4th one. 3rd gen started to be released with the X-men RX-8.
Tab lowered=lowering the tabs on the car that hold the body on to create a lowered effect. Your going to have to search for that one yourself, but here's a hint, look for work done by Ahh5hit!