Apologies if the answer to this lies somewhere in the FChat archives, I have not been able to find it so far... I have been advised by the folks who look after my manual 456, that to make an improvement to its road-holding, and even make it more suitable for the odd Fcar trackday (which let's face it the stock 456 is not really), it would be a good idea to fit the larger 18" 550 wheels and tyres. This would give a handling improvement with wider, lower-profile tyres and also accommodates the 550 'Fiorano' brake upgrade if wanted. This upgrade pack is for the 550 and allegedly gives it the same brakes as used on the F50, large slated disks (too big for 456 17" wheels) and 4 pot racing calipers - both Brembo I believe. The usual choice of Pagid pads are possible, and I would probably go for the road and track usable "blues", as in the past I had ceramic pads (yellow) on my 355 which were rated 400 - 900 celcius (F1 cars around 700c) but didn't work too well in road use as they never got the heat in them... I'm hoping the money side wouldn't be too crazy, as I'd be happy with a 'pre-owned' set of 550 wheels (although not tyres) and my 456 tyres are towards end of life anyway. The brakes are pricey (GBP 1700 all-in), but I can always keep the original brakes and wheels and put them back on later. Anyone got any thoughts, or even better experience, on this subject? Thanks in advance. James.