Genuine Cummins Part
Fits 1989 through 1998 Dodge Cummins 12 Valve Engines
There are a few key reasons why silicone costs more than nitrile rubber. First, silicone has a much higher melting point than nitrile rubber, which means it can withstand higher temperatures. Second, silicone is much more resistant to degradation from UV light and other environmental factors. Finally, silicone is a more elastic material than nitrile rubber, meaning it can be stretched further without breaking.
That is why these are the best valve cover gaskets you can buy!