I'm trying to adjust the rake and reduce the wheel gap while getting the wheels as flush as possible. Now I know this setup isn't as wide as some of the wheels I've seen lately, but what do you guys think? What suspension setups would you recommend? Do I need spacers to get the wheels flush?

Current setup is as follows CE28N 18 x 8.5 + 30, wrapped with 235/40 Hankook Ventus V12 with stock GSR suspension.

 

Spacer it out and lower it slightly would be your best bet.

 

What would be the right spacers for 18 x 8.5 + 30?

 

big fan

 

You could try to measure but I'd guess a 10-15mm to make the wheels essentially a +15 +30. Ultimately depending on your fenders.