they help ALOT!!
ive owned alot of yokomos
few drift packages
and the stage 1 kit is a good upgrade
their really good
from looks of ur modded one
u have a type b kit so you would need the type b stage 1 kit
also those alloy arms will bend when u hit something and then all their good for is a paperweight
get yokomos hardened arms that the lcg and bd use
their ALOT stonger then the stock arms
if you dont then take off the sway bars since their not connected to anything

to me ur chassis is upgraded to look good and perform like stock no offence