TRD Swaybars!!!! best bang for the buck!!!! they cost like $500 for both front and rear but man what a difference!!!!
http://www.l-tunedparts.com/html/partsorde...dering-trd.html
That's the place to be enjoy!!!!!
Bro the H&R's are way better than the Eibach!!!...plus they are lower!!
The quality is awesome from the H&R's those are the ones that I had in my 400.
It will cost you anywhere from $100-200 to get installed depending on the shop and where you live.