Here is a OEM SR20VET Metal Head Gasket. 1.1mm thickness. We offer these in a variety of bore sizes.
The larger bore gaskets are machined to order and are labeled for the bore size. We machine the gaskets .5mm larger than the bore size. So if you order an 86.5mm gasket, it will measure 87mm.
86.5mm and larger gaskets may take up to a week to ship. They are machined to order.