Quicksilver - Exhaust Manifold V8 MerCruiser Series Coated Cast Iron 860246A15. Overview. There's a certain warmth that comes from working on a V8 MerCruiser - the kind of engine that growls to life with a tone that reminds you why you got into boating in the first place. When you're replacing a manifold on one of these motors, you want a part that feels solid in your hands and trustworthy once installed. This Quicksilver exhaust manifold brings that same confidence. It's built for boaters who k