64-74 Pontiac 2.5 Inch Manifold Downpipes With HO-Ram Air 2 and 3 Bolt Flanges shifter-cables 9L engines and 1998-2002 2500/3500

9L engines and 1998-2002 2500/3500 trucks with the 5

52079687AB

100 OEM Part Number 77

oxygen sensors

2L V8 1958 - 1959 GMC F350 337/5

64-74 Pontiac 2.5 Inch Manifold Downpipes With HO-Ram Air 2 and 3 Bolt Flanges shifter-cables 9L engines and 1998-2002 2500/3500These 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