Flowtech 31730-3FLT Exhaust ManifoldExhaust Manifold Exhaust Manifold; For Use w LS Engine Swap; 2. 25 in. O. D.; Black Ceramic; SPECIFICATIONS: WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm www. P65Warnings. ca. gov FEATURES: Intended For GM LS Engine Swap 304 Stainless Steel Mating Flanges Included 2 Bolt Exit Flange Configuration Hi Silicon Moly Ductile Iron To Provide Durability Tight Tuck Design These Flowtech cast iron