My racing setup is 18" on all corners. You want an offset of 30 to 32 on the front. 20 to 25 on the rear. I have 18x9 ET 30 front and 18x10 ET 25 rear. 245/35/18 front and 275/35/18 rear. The rims your looking at require a 10 mm spacer on the rear and 5mm front along with the correct length bolts. Hub centric spacers are OK but for the cost of the rims, spacers and longer lugs it makes sense to consider custom rims that fit correctly.

Les