Magneti Marelli, a manufacturer of original equipment manufacture (OEM) and aftermarket parts, was co-founded by Fiat and Marelli over 100 years ago. In 1967, it became a full subsidiary of Fiat. When Chrysler was taken over by Fiat to form FCA, there was consideration of merging Mopar under Magneti Marelli and dropping the Mopar brand. Fortunately, wiser minds prevailed and kept Mopar as is, while marketing the Magneti Marelli parts through Mopar for Chrysler and other applications. In 2018, Magnetti Marelli was sold by FCA to a Japanese company which the combined companies then became Marelli. It continues to provide OEM and aftermarket parts.
Magneti Marelli does own Weber, and Weber has made carburetors and castings for the Edelbrock Carter-based carburetors. Weber was taken over by Fiat in the 50s, and was placed under Magneti Marelli.