Dim A (1) 48" Long Dim B (2) 4" w/ Slot Dim C (3) 3 3/4" I.D. Clamp is Stainless Steel, Not Chromed Replaces Part Numbers: ZNL89375C (x 1), ZNL90875A (x 1), PM90875A One New Aftermarket Replacement Curved Chrome Exhaust Stack With 3 3/4" I.D. and O.D. -- (Clamp Included). Excellent Chrome Stack For Ih Applications With 400 Series Diesel Engines & 3 3/4" I.D. Manifold Outlet.