1. that means to the gray bulks skidplates and other grey parts off the tmaxx and revo drive shafts

if you are worried about weight get some rpm parts they are better then 6061 alum if you ask me cause alum bends easy and a really good shocks are the pro line powerstrockers

2. how many cells cause mamba max i would only run 12 cells also wat batteries cause for a bl system u need good batteries also depending wat cells u run will tell u wat motor to get nothin over 12 for 7xl 14-16 cells for 8xl
18-20cells for 9xl and that is running them hard i just read that u run 14 4200 wat brand is it IB and if money isint a problem get lipo

http://www.rc-monster.com/proddetail...o5408xl&cat=20

http://www.rc-monster.com/proddetail...RK_125A&cat=21

http://www.rc-monster.com/proddetail...per-Kit&cat=40

http://www.rc-monster.com/proddetail...GY_DIFF&cat=40

http://www.rc-monster.com/proddetail...LM18700&cat=17

http://www.rc-monster.com/proddetail...R-AL-WS&cat=17

http://www.rc-monster.com/proddetail...13501s7&cat=17

http://www.rc-monster.com/proddetail...03idler&cat=17

that is basicly all u need to get a reliable truck that will defelently be fast and if you are really into racing get this http://www.rc-monster.com/proddetail...-CHR-CF&cat=11 it will handle like nothing else i almost forgot

http://www.rpmrcproducts.com/product...ts.htm#2_5arms

welcome to the fourm and ask any thing you need