Gaskets are either 0 stars (not working) or 5 stars (working well). If it doesn't work well, it doesn't work at all. Looks like she's a little bit pregnant. But I digress. Gasket material appears to be identical to OEM. Dimensions are 100% identical to OEM for gaskets and grommets. Using this kit will help you learn some installation tricks as it doesn't come with clear instructions. This particular gasket doesn't use sealant spray to attach it to the valve cover (IIRC, it's listed on the box)…