S&S Cycle Manifold Conversion Kit for 80in. Evolution 160-1658Kit converts stock 80in. Evolution manifold to a more rigid mount system Eliminates cracking and leaking problems associated with the stock rubber compliance fittings Includes an S&S Performance manifold, mounting flanges, two specially molded O rings and two . 350in. spacers for spacing out the stock air cleaner or carb mount bracket Fits 84 99 80in. models if flange type carburetor or adapter is used Replacement flange seals also available Made in