Review on Mr Gasket 9815 Filler Plug by Andy Mitts

This product was unusable as it was almost impossible to fit in the small block Chevy valve cover that I have. The rubber material on it is hard and strong with no real deformation. The Chevy factory oil filler cap is made from a more flexible rubber material with a hollow center for easy installation. A very disappointing product that is also made in China. It will look good on my tool bench but will never be installed on my engine.