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Sierra OMC Riser 18-1909-1 Quantity in Basket: None Code: 6828 Price: $264.95 Shipping Weight: 25.00 pounds Quantity: 4" outlet 7°Fits many GM & Ford center rise manifolds.Use with 18-1986-1 manifold.Replaces: OMC 913784, 3855270, 3850456, 3857944.Volvo 3855270-9, 3857944-7, 3863061. Related Item(s) Code Name Price Availability 6826 Sierra OMC Manifold 18-1986-1 $365.95