Brass Freeze Plug by PCM - Freeze Plugs for GM Marine Engines 1-5/8"

OEM R069066

Use for GM on the side of the block

TIP: Put these in the freezer for a couple of hours before installing. This makes them easier to drive in and really helps when you are in an awkward position trying to install the freeze plugs.

LESS Expensive Option is the tried and true Sierra® Brand HERE