Mercury - Quicksilver Reducer Kit Exhaust System Component Aluminum 44349A1. Overview. If you're working on a MerCruiser inboard and need to adapt your exhaust setup, the Mercury Marine 44349A1 Quicksilver Reducer Kit is the part for the job. It's designed for MIE V8 engines and built tough enough to handle real marine conditions - heat, vibration, and saltwater included. Made from painted aluminum, the reducers meet SAE J2006 marine exhaust standards, meaning they've been tested for strength an