I need to buy some new wheels. I want 18x8.5 up front and 18x9.5 in back. The wheels I found have a 30mm offset for the front and a 38mm offset on the rear.

The 9.5" is also available in a 15mm offset.

The brand is this http://www.enkei.com/RacingSeriesSpecs/RPF1.html

or this http://www.enkei.com/RacingSeriesSpecs/GTC%2001.html

I have a G35 COUPE with Brembos

 

Best fitment of the RPF1 is to run 9.5 +15 front and 10.5 +15 rear.

On GTC01, 9" +18 and 10" +22