I am planning on the doing the following upgrades:

KW Variant 3 Coilovers
Progress F/R Sways
RPF1 17X9 +35
Hawk HP Plus Pads

Questions:

Do I need endlinks for the sways?
What tire size best matches this rim size?
Is there vendor I could buy all these upgrades from?

 

Here is the vender you can buy them from.
http://www.fluidmotorsports.com/s-84-rx8.aspx

 

I would not use stock/oem end links with aftermarket sway bars. I had Tanabe GF210 Springs on my 8 and my oem end links bent back. Get the AP sway bars and end links. They are the shiznit!
I sent you a PM.

 

I priced the KW variant 3 coilovers a few months back, click the link for the best price.

https://www.rx8club.com/showthread.p...t=kw+variant+3

 

im dropped on tanabes and i got stock endlinks like the poster above said not a good idea im goin to be changing mine asap

 

You will have a very nice suspension once you are done!