Edelbrock part #7086 Victor Tunnel Ram top is for use with 4500 series carburetors (mounted in-line) and our Victor Tunnel Ram base manifold only on Big-Block Chevy applications. The Edelbrock Victor Tunnel Ram top also features a natural aluminum finish for a classic look. For the ultimate "Made in USA" quality, every Edelbrock intake manifold is cast and machined in the USA.