The Sierra 18-3316 Water Pump Kit is a fit specific kit, consult your authorized dealer to ensure proper fit. Each Sierra product meets or exceeds the original equipment part it replaces. Same as 18-3319 except base. Includes Water Pump Base (46-96146A6) 18-3416. Designed to be interchangeable with GLM 12150, Mallory 9-48310, Mercruiser Stern Drive 46-32437A3, 46-37433A1, 46-96148A8 and Mercury Marine 46-32437A1, 46-37433A1, 46-42579A4, 46-44292A4, 46-48747A3, 46-57234A3, 46-58618A4, 46-60367A1, 46-60367A4, 46-64141A11, 46-69222A3, 46-73802A3, 46-73804A3, 46-78400A2, 46-96148A5, 46-96148A8