These are a full set of 16 Howard's cam 95018 pushrods. They can be used to just upgrade from factory one or as a performance set used with more aggressive camshaft profiles. With heavier wall and stronger steel they are a great choice. Make sure you check your pushrod length prior to purchase. These are 7.400 long pushrods. I believe they will fit all 2001-2013 gm LS based platforms.