Marine Dual-Bank Raw Water Crossover Manifold Pipe 3771-257 - Used

Application: Marine diesel engine dual-bank raw water crossover / H-manifold pipe with bronze flanged ends and center rubber sleeve connector — consistent with Detroit Diesel 71-series and similar V-configuration marine engines. Condition: Used, repainted, serviceable; shop reference number 3771-257 hand-marked on one flange. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.