Sierra 18-1845 MerCruiser V6/V8 GM Dry-Joint Exhaust Elbow Replaces 864591T02 This Sierra aftermarket exhaust elbow is for use with Mer Cruiser V6/V8 GM engines with dry joint exhaust manifolds. This exhaust manifold is for 2004 and newer V6/V8 GM 305, 350,m & 377 engines 0W310000 & Up as well as 2002 and newer GM 350 & 377 engines 0M317000 & Up.Application Info: MerCruiser (V6 2004 - Newer & V8 2002 - Newer); 4.3L MPI Alpha/Bravo 0M30000 - Up; 4.3L CARB Alpha/Bravo 0M615000 - Up; 5.0L MPI Alpha/Bravo 0M300000 - Up; 5.0L CARB Alpha/Bravo 0M600000 - Up; 350 MAG MPI Alpha/Bravo 0L010019 - Up; 350 MAG MPI Horizon Alpha/Bravo 0M300000 - 1A299999; Interchangeable With: MerCruiser; 864591T02; HGE 4591; ; GLM 51147; ; Barr MC20864591; ; Use With: Manifold: 18-1842; Manifold 18-1843; Riser Gasket (Closed): 18-0720; Riser Gasket (Open): 18-0721; Riser Gasket (Restricted): 18-0722;