Flowmaster introduces their manifold downpipes for 1965-1968 Pontiac A-Body vehicles with 389/400 V8 engines. These 2.50” mandrel bent 409S stainless steel pipes only fit with manifold castings 9779032-D/S and 9779328-P/S and include the factory 2-bolt flanges. These downpipes are covered by Flowmaster's Lifetime Limited Warranty.