The product is an original GM 283 327 SBC 6 1/8” Harmonic Balancer with a manufacturer part number of 3896904. This vintage part is specifically designed for use in 1955-1965 Corvettes, offering a balance for the engine to run smoothly. 250HP and 300HP. The brand, GM, ensures quality and compatibility with the vehicle, making it a reliable choice for those seeking authentic parts for their classic car restoration projects. GOOD CONDITION. #6269MATT