KO Basic Single T4 kit for 2jzgte (cast manifold, short 3" downpipe with re-routed wastegate dump and a 46mm v-band wastegate. Dyno comparison of Precision 5862 turbo versus 6266 turbo.
Blue line is 5862 and red line is 6266. Boost was controlled only by wastegate spring (18psi spring), but boost level logged for the 5862 was 17.5psi at peak power, and 18.5psi on the 6266. Average boost for the runs was 1-1.5psi higher with the 6266, which would account for most of the difference in power.