m5board.comoholic (>1000 posts)
Join Date: Apr 2005
Thanked 62 Times in 55 Posts
Yeah, the disk size is slightly smaller than the stock M5 disks, and they are thinner too. But the difference in thickness is only caused by the gap between the 2 parts that's smaller.
BMW doesn't offer the brakes for the 335i, but they DO fit. It's a direct swap, without adaptations. And trust me, these brakes are MUCH better than the stock M5 or 335i brakes.
The front Performance brakes have huge brake pads, the rears have rather small pads, smaller than the stock M5 rear pads. Apart from that, the calliper is mounted directly to the car, there is no bracket. So there's no bracket to adapt, to make them fit the M5.
Not sure if everybody got this right: to fit the Performance brakes on an M5, you need special brackets, which cannot be bought from BMW. I had a few of those machined, and those were pretty expensive. They were 130 euros for a set. If there is enough interest, I'll have another batch machined...