These are the OEM replacement exhaust manifold bolts for your LT1/LT4 Camaro. These are both heat treated and come with pre-applied thread locking. General Motors recommends that they be replaced every time they are removed.
General Motors is an OEM manufacturer. GM designs and creates the vehicles and the parts for them for makes such as Buick, Cadillac, GMC, and Chevrolet. All GM branded parts are OEM standard quality components and were designed and manufactured to either be on the vehicle from the factory or purchased after the fact as an accessory.
