j
As others have said you may find it difficult to get the wider tyres to fit the 8j, and you may need to roll the arches as well if the suspension is lowered. I would go for the 17x7.5j ET35 size as there are lots of tyres to choose from in that size.

My Saff with 17x7.5j and 215/40/17 Federal RSR trackday/road legal tyres.

Rolled arches front and rear needed to give enough clearance.