flat incision at the connecting edge. Short cab 2.2 Dynomax muffler recommendations High Polish Exhaust Fitting A-KARCK Exhaust Adapter Connector 2.5" OD To 3" ID, Exhaust Pipe Stainless Steel Reducer About this item The product is ID 2.5 exhaust adapter. It shares same inner 3.6 inches size on both sides. The overall length is 3.6 inch and the thickness is 1.37mm Made of stainless steel, welds to two metal pipes of same diameters can form a tight seal against leaks. The surface of this product is smooth and beautiful, which is very suitable for pipe connection (Please check the detailed... The exhaust pipe adapter is made of non-magnetic stainless steel, anti-corrosion and durable, ideal for all pipe connections. 2.5 to 2.25 inch Exhaust Reducer Adapter & V-Band Clamp Coupler Joiner Size: one side inner diameter 2., 5 inch to one side of outer diameter 2., 5 inch., Tube length 3., 6 inch, tube thickness 0., 04 inch, allow tolerance 0., 1 inch