what does it mean?
pt67 = 67mm etc.
pt = precision turbo (the brand)
t is usually turbonetics, but other companies use T in the beginning of the turbos as well
GT = garrett turbo, they have a little different naming structure which is explained in one of the links in the turbo faq.
r, s, q, etc refers to the shaft size, i think thats also explained in the links


