Having had my 156 GTA for 8 trouble-free months I have started experiencing the 305mm brake warp problem!
I replaced the standard (warped) discs for some drilled and grooved versions and everything was fine - for 3 weeks! Now I'm back to square one
So I today took the car for it's 35,000 mile service at an Alfa specialist and got talking to the chief mechanic.
He reckons the problem is something to do with the hubs not being exactly square with the discs - a problem that even Porsche have experienced. This creates a natural "wobble" that becomes worse as the discs are heated up through normal use. The solution (as apparently all Porsche dealers are equipped to do) is to grind the discs whilst they're on the hubs.
Not entirely sure if this makes sense, any thoughts people?
My '02 GTA is out of it's warranty now, so I expect I won't get any sympathy from the local dealer if I ask for the 330mm upgrade (which my mechanic says is basically the brake setup from the 166).