I've seen photos of brembo conversions on the GT/156 or 147 before but as my callipers will already be refurbished, i can't strip the caliper down to fit a 4mm spacer between both halves (making the 166 calliper accept a 330x32mm disc from a 156GTA etc)
To overcome this I'm planning of using the brera/159 330x28mm disc, if you was going down this same route id suggest using the 166 callipers with the spacer and the later GTA disc's as you won't need to get brake discs redrilled every time you want to change you brake discs. my theory is by the time il need a new set of discs i will just add the spacer and refurbish the calipers with the addition of the 330x32 discs.
can't comment on how much better they will be than stock but aesthetically they should be nice and the disc size is going up from 284-330mm with the calliper being changed from a single piston to four piston.
I'm hoping it will be a good increase but will update this when i get around to fitting them.
Last edited by lewis88; 04-10-14 at 21:11.