E90 BMW 335i front brake calipers
Dirty but perfect condition brake calipers from an e90 335i. This will allow you to run 348mm rotors on the front and should be a straight swap (with pads and rotors) on your 330i. I don't know what's required for other models. I also have a set of rotors with light use to suit if you're interested. On the northern beaches. I'd prefer not to post as they're bloody heavy but I will at your cost if you're keen.