The product is a rare set of Factory G.M. Chevelle SS 454 smog exhaust manifolds from 1973-74. These bolt-on manifolds are made of cast iron in a gray color, with the manufacturer part number 329225 & 353028. They are designed specifically for the front of the vehicle and are vintage parts manufactured in the United States by GM. These manifolds are intended for gasoline fuel type and are not universal fitment, making them a unique and specific addition to any classic car restoration project. No welds, No cracks, No broken ears, No prior repairs. Bid with confidence. Thanks.