Amazon.com: Universal 2.75" ID to 3" OD Exhaust Pipe Adapter Connector Reducer 304 Stainless Steel 2.75 Inch to 3 Inch 2 3/4” ID to 3” OD kit : Everything Else
Amazon.com: BLACKHORSE-RACING 2.5 inch ID - 3 inch ID Universal Exhaust Pipe Adapter Connector Reducer Stainless Steel (2.5" ID - 3" ID) : Automotive
Amazon.com: Universal 2" ID to 2.5" ID Exhaust Pipe Adapter Connector Reducer 304 Stainless Steel 2 Inch to 2.5 Inch 2” ID to 2 1/2” ID kit : Everything Else
2.0 to 1.5 inch / 51mm to 38 mm Motorcycle Exhaust Pipe Adapter Reducer Connector Joining Sleeve for Suzuki Exhaust Reducer Pipe - AliExpress
JEGS 31974: Aluminized Steel 3 in. ID to 3 in. OD Slip-On Exhaust Pipe Adapter - JEGS