TWIN POWER 55MM ALUMINUM HIGH FLOW INTAKE MANIFOLD 2017+ M8TWIN POWER 55MM ALUMINUM HIGH FLOW INTAKE MANIFOLD 2017+ M8 The Twin Power 55mm Aluminum High Flow Intake Manifold replaces the stock plastic unit with a durable, cast aluminum design that improves airflow, throttle response, and overall performance on 2017 and later Milwaukee Eight Big Twin models. Offers increased durability, flow and performance over the stock plastic part Fits 2017 and later M8 Big Twin models with round intake ports (GEN 1) Cast