Flowmaster introduces their manifold downpipes for 1965-1974 Oldsmobile Cutlass and 442 with the 400 and 455 V8 engines. These 2.50 in. mandrel bent 409S stainless steel pipes fit vehicles with cast iron manifolds and include the factory style 2-bolt flanges. These downpipes are manufactured in the USA and are covered by Flowmaster's Lifetime Limited Warranty.