hi prime,
first of all some might say there weak i say to them stop hitting shit now thats out of the way!.dont get the e4fs i found that the handing wasnt not as good as the e4 with the alloy bling if i was you i would go the e4rs as i have and found its alot better car then the e4fs as its to stiff for the racing i do i found the more flex to a point i get out of the car the better it is as im a person that loves heaps of steering.the standed set set up that comes in the kit is good the only thing you might do is change to stiffer springs as they might be to soft for mod.stock there ok i was the first to race the e4 at my track now we have 4 going around the track and doing ok but the rs is the pick then ,e4 with the bling the first 1, then the rsfs but this is all down to my style of racing.To wrap this up im sure what ever 1 you get they will perform well happy racing hope i could help.