Thermal R&D 3" Fiesta ST Exhaust Adapter (connects to 3" downpipes) – whoosh motorsports
Amazon.com: Universal 2.5" ID to 3" ID Exhaust Pipe Adapter Connector Reducer 304 Stainless Steel 2.5 Inch to 3.0 Inch 2 1/2” ID to 3.0” ID kit : Everything Else