The most widely used original equipment supplier for General Motors is AC Delco, one of their many subsidiaries. The name combines that of one of the founders Albert Champion with Dayton Engineering Laboratories Company. Drivers of any Chevrolet, Buick, Cadillac, or GMC can be sure that the reliability of their vehicle is owed, in some degree, to parts from this company. They offer a diverse collection of product lines such as wire harnesses, air & oil filters, drive & serpentine belts, and steering components... just to name a few. AC Delco makes nothing but great products, and every service technician or mechanic knows that they are a premier brand.
Removing your intake manifold or cylinder head requires you to replace your intake manifold gasket so that you maintain an air-tight seal.