Product DetailsNew Sierra 18-1845 exhaust riser for MerCruiser V6 and V8 marine gas engines with dry-joint style exhaust (2004 and newer). Replaces 14 degree down-angle risers (does not replace 7 degree versions). This riser will fit either side of the engine and accepts all original mounting brackets. Does not include gasket. Please view gasket options here. Each purchase is for one riser.