Mini (late) oil filter head gasket, suits spin on filter head
GUG705553GM- GASKET OIL FILTER HEAD SPIN ON FILTERS ONLY
Gasket for all spin on filter heads to block, we have found it important to make sure the screw on filter head surface is flat when replacing this.
What we do is:
Get something flat (we use a piece of glass) then lay some wet and dry 600 on it and then rub the surface of the filter head against it in a figure 8 motion, you should aftter a few rubs be able to see where the low points are, do this until it is dead flat.