LT1 HPFP Intermediate fuel pipe, used for the LT4 HPFP upgrade for the LT1.
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.