stock mazda clutches are only designed to hold up to what the factory hp is.
although this is true, you dont need to upgrade your clutch when you install a turbo kit....Mazsport installs plenty without a problem....
Anyway, I have 53k with almost every mod possible for the NA and my warranty isnt voided yet! It really matters where you go for work.
Wesley Chapel Mazda is great about mods. Talk with Mario (SVC mgr)....also Classic Mazda in Orlando.....
PM me if you need details.....