Tsolin is correct, I added a 10mm and a 2.5mm spacer making the offset even lower. But I have the exact offsets as u Steve. +17 up front +18 in the rear. But adding the 12.5mm in spacers makes it +17 front +5.5. With 9.5 and 10.5 widths and 255/40 and 305/35 tires... Check out the pics below. Pm me and I'll send u a pic with no spacer installed in the rear and you'll clearly see the difference. The 2.5 just further pushed out the rear but the 10mm h&r looked great too. My color wheel is custom since I had them refinished. It's a local places gunmetal.
Excuse the grossness of the lip but I had just got the sport brakes put on and snapped this pic with grungy lips haha