I've done a fair amount of searching and haven't found the answers I'm looking for. I found one forum post somewhere of someone saying they're going to do what I want to do but they never followed up.

I have the brembo wheels on a '13 gt and I'm considering 15mm spacers in front and 25mm in back.

The 25mm in the back, it sounds like there's no issue with that. The 15mm in front, I haven't been able to find anyone using them with the brembo wheels. I think I saw somewhere that you had to trim a few mm off the studs to use them but they weren't talking about the brembo wheels.

The 15mm ones are the H&R DRM with their own studs.

 

Yes you have to trim a bit. I had 20mm spacers on the front.

 

Which wheels did you use 20mm spacers with and how did it turn out?