if using OEM wheels from either VW or audi and using spacers you will need longer bolts (ball seat) I'm running some from an A6 now with 8mm. Just measure your stock bolts and add the same amount as the spacers are thick to get the new length. I highly suggest you put spacers on anything other than 35 et stock wheels for your car. It will look like crap without, imo. Here's a pic of my ET43 wheels on 8mm spacers. Perfect, imo. I got new lug bolts and spacers form ECS Tuning. Good prices on that stuff.