How big our m. shadows plugs?

Question

our the double zeros or 7/16

Answer 1

Idon't really know , but i would try a 5/8 socket .

Answer 2

i can confirm 13/16 socket.

Tested out for you since my turbo shadow's head is on the work bench getting a new bigger turbo.

Answer 3

the 2.2 uses a 13/16 plug socket i think,its been while since i have worked on one.good luck.