Mr Gasket 9815 Filler Plug Review

Based on my experience, this filler plug is a great addition to any high-performance engine. It fits perfectly, ensuring no leaks and easy installation. The construction is sturdy and durable, making it ideal for racing conditions. The only downside is that it may be a bit more expensive compared to other filler plugs on the market. Overall, I would highly recommend it for anyone looking to upgrade their engine parts.

This did not fit my CJ7 Jeep. Should have, but didn't. The rubber is stiff and hard so I had to shave off the side rubber and drill a big hole in the center to make it more flexible and make it work. Love the look compared to the other oil plug that came with my valve cover. Oil holds and works as it should.

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.