This interactive pie chart visualizes car performance metrics, allowing users to toggle between horsepower, torque, and highway MPG while grouping data by individual models or manufacturers. The visualization aggregates the dataset and limits top slices with an "Other" category for readability. Built with D3.js v6, it uses the `d3.pie` layout, `d3.arc` generators, and `d3.scaleOrdinal` for colors, with hover tooltips, animated slice transitions via `transition.attrTween`, and an interactive legend. The responsive SVG chart adapts its width to viewport size.