2" intermediates Works OK on these Slant /6 (which I've been hesitant to post)...$399+ freight for the Clifford's. These you might get some interest/info from seeing ? IF anyone wants a Set I have NO problem sending them Stateside, Even sectioning them up strategically to make a smaller shipping Package, even Considering just making the 2 x Top Pair SETS avail, So you Can flange/Expand the INTERMEDIATE Tubes & extend, Y merge or pair off into true duals to your hearts content ..