An exhaust system modification designed for a specific marine engine, this component directs combustion gases through the hull of a boat rather than through a traditional, underwater outlet. It is tailored for a 5.7-liter Mercruiser engine, a common powerplant in various recreational boats. Such a system typically includes exhaust manifolds, risers, and the necessary hardware for routing the exhaust through the boat’s hull.
Implementing this type of exhaust offers several advantages. It often reduces backpressure on the engine, potentially improving performance and fuel efficiency. By routing exhaust gases away from the stern, it can also decrease the noise level and eliminate the exhaust fumes that might otherwise accumulate in the boat’s wake. Historically, these systems were favored for their aesthetic appeal and performance gains in racing applications, leading to their adoption in recreational boating.
