64-74 Pontiac 2.5 Inch Manifold Downpipes With HO-Ram Air 2 and 3 Bolt Flanges shifter-cables GMC C1500 (1979-1981)

GMC C1500 (1979-1981)

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64-74 Pontiac 2.5 Inch Manifold Downpipes With HO-Ram Air 2 and 3 Bolt Flanges shifter-cables GMC C1500 (1979-1981)These 16 gauge Stainless Steel Mandrel Bent downpipes fit directly onto factory cast iron Manifolds. For HO or Ram Air applications. Includes one 2 bolt and one 3 bolt flange. Please verify the bolt hole pattern your manifolds have before purchasing these downpipes. (1) 2 bolt and (1) 3 bolt flange will be DGA20S23 and (2) 3 bolt flanges will be DGA20S33. Some manifold manufacturers are no longer differentiating flanges based on the year. Pypes