I looked into the AP 4 pot kit, but it seems like the caliper will stick out much more. In fact I think I would need to fit 15 mm spacers behind the wheels to make them clear the calipers. And with those 15 mm spacers the wheels would stick out quite far.

So I have been looking into other options and found a set of calipers that may be useful. The calipers of a BMW E38 750i (not the Brembo 4 pots) have 2 pistons, both on the inside of the disc so are still of the sliding type. I'd rather have 4 pots, but the fact it's a sliding caliper means it doesn't need much room between the disc and the wheel. The BMW also runs 334 mm x 32 mm discs, so that also seems good.

The 750i caliper is the one in the middle.



But there is only one problem. The brake pads of the BMW have a pad swept area of 73 mm and the only rotors with bells I can find upto now have a pad swept area of 60 mm. For the inner pad it's probably not really a problem, it just sticks out a bit on the inner side of the rotor. But the outer pad will hit the aluminium bell. And I'm not sure if cutting the inner 1.5 cm of the brake pad is such a good idea...

Other options would be single piece discs from an other car that fit. But those aren't really easy to find...

Anyone know of any options for the discs to use?