18x9 +18 with 20mm wide fenders is sunk city. That would be flush with stock fenders and 0 camber. Rear is a good size though. S14 have almost the same amount of space granted you run the same amount of camber. So, youre adding more space to a wheel thats already more sunk the the rear. 18x10 +8 will clear if you stretch or 235/245 40 with some camber.
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