Flowmaster 81071 - Manifold Downpipe Kit

65-74 Chevelle/El Camino, 68-69 Nova, 68-70 Caprice/Impala/Bel Air, 70-74 Monte Carlo, Big Block Engine, With 3 Bolt Manifold Flanges, 2.5" Mandrel Bent Tubing, Includes Donut Gasket And Donut Sleeves, 409S Stainless Steel Flowmaster's manifold downpipe kits are designed for the person who wants to use a Header-back exhaust system while using the factory exhaust manifolds. Utilizing mandrel bent 409S stainless steel tubing and high quality flange gaskets, Flowmaster's manifold downpipe kits are designed for the perfect leak free fit.