This Oil filled nylon Supercharger Isolator is a direct replacement for the spring loaded noisy isolator in your LS9 LSA LS  LS1 Engine 2009-2014. 

This oil impregnated material has been used for years in Eatons M-series superchargers. The oil impregnated material is a great application in LS superchargers where the isolator runs in a dry cavity.