I have 225/40s on 8" wide ET29 wheels in the front. They're pretty flush. In the back I now have 235/40s on 8.5" but had 255/35s before that (either size is fine) ET40 but with 5mm spacers. I didn't want any fender rolling so I went conservative in the back, for flush with a sedan on 8.5" rims in the rear you'd probably want about ET30-32 or so (which would be an 8-10mm spacer for me). I'm running the H&R Touring cupkit.
Easiest way is to seach through pictures of peoples cars you like and ask them their wheel setup, you'll get where you want faster than fishing in here.
P.S. If I were starting from scratch and didn't get such a killer deal on rims with tires I would've gone square. I'm fine with it how it is though.
Originally Posted by MTA330ci
Does anyone have a recommendation on which is the best high performance valve stems?