They will be fine if you get them 'square', so same width and offset all round - 8J et42.
I've got BBS VZ which are 18x8 et44 all round and they're an easy fit on H&R springs (about 30mm down) with 225 40 tyres. I could probably space them a good 5-8mm if I wanted to. The width and offset of these reps at 8 wide, et42, would poke 2 mill more... So yeah, no issue with fitment.
Can the company tell you how much they weigh though? Some reps are ok, some are too heavy!