Porsche brake upgrade

[Mk2_tel]

I have the calipers and I was also going to replace the slave but do I need to replace it with a bigger one?
As the calipers are a lot bigger etc cheers
There 4pot brakes 996 is it?

[Mk2_tel]

?? Any advice ??

[Prawny]

Assuming you've bougt the right calipers, there is no need to change the master cylinder at all. the stock 23.8mm master cylinder will work well with 996 fronts, which are 996.351.425/426 calipers.

I'm guessing you mean master cylinder also, as the 'slave' in the system on a car is the caliper itself.