Quicksilver - Dry Joint Exhaust Elbow MerCruiser V6 & V8 Series Hot-Dipped & Powder-Coated Cast Iron 864591T02. Overview. There is a certain calm that washes over you when your engine settles into a steady rumble - no ticks, no hot spots, just that smooth rhythm that tells you everything beneath the hatch is working the way it should. A good exhaust elbow plays a big part in that confidence. When you're running a MerCruiser V6 or V8, especially one that's been with you through a lot of long days