Amazon.com: Universal 2.5" ID to 3" OD Exhaust Pipe Adapter Connector Reducer 304 Stainless Steel 2.5 Inch to 3.0 Inch 2 1/2” ID to 3.0” OD kit : Everything Else
Exhaust Adapter ALZ 5" OD x 4" ID
PLM 3” to 2.5” Exhaust Adapter Flange
Amazon.com: Peastorm 2.5 to 3 Inch Exhaust Adapter, ID 3 to 2.5 Exhaust Reducer Connector Pipe with Clamp : Automotive
5" ID to 4" OD Custom Exhaust Reducer / Adapter / Coupler - Diesel - Performance-Curve
Amazon.com: Peastorm 2.5 to 3 Inch Exhaust Adapter, ID 3 to 2.5 Exhaust Reducer Connector Pipe with Clamp : Automotive
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
Amazon.com: EVIL ENERGY 2.5" ID to 3.0" OD Exhaust Reducer Adapter Stainless Steel : Automotive
Exhaust - Adapter-Reducer - 2.75 inch to 2.35 inch for JHM B7-RS4 2.75 inch Catback to Stock Downpipes
Universal 2 1/2" Dual Outlet Tip x 3" Inlet Exhaust Steel Y Pipe Adapter Reducer | eBay