Specification: 16488(Left) AIR TUBE: No Air Tube Count: No Body Material: Stainless Steel Body Shape: Round California Certified: No Converter Quantity: 1 Body Height: 4.125 in. Body Length: 8 in. Body Width: 4.125 in. Overall Length: 28.625 In. Inlet 1 Type: 2 Bolt welded flange Inlet Quantity: 1 Inlet Type: 2 Bolt welded flange Mounting Hardware Included: No Outlet 1 Type: 2 Bolt welded flange Outlet Quantity: 1 Outlet Type: 2 Bolt welded flange Oxygen sensor location: Pre Catalyst Substrate Material: Ceramic 16489 (Right) AIR TUBE: No Air Tube Count: No Body Material: Stainless Steel Body Shape: Round California Certified: No Converter Quantity: 1 Body Height: 4.125 in. Body Length: 8 in. Body Width: 4.125 in. Overall Length: 25.625 In. Inlet 1 Type: 2 Bolt welded flange Inlet Quantity: 1 Inlet Type: 2 Bolt welded flange Mounting Hardware Included: No Outlet 1 Type: 2 Bolt welded flange Outlet Quantity: 1 Outlet Type: 2 Bolt welded flange Oxygen sensor location: Pre Catalyst Substrate Material: Ceramic 16478(Left) Body Height: 4 in Body Length: 8 in Body Shape: Round Body Width: 4 in California Air Resource Board (CARB) Certified: No California Certified: No Converter Body Length: 8 in Converter Body Material: Stainless Steel Converter Quantity: 1 Inlet 1 Type: 8 Bolt Welded Flange Inlet Port Shape: Oval Inlet Quantity: 1 Inlet Type: 8 Bolt Welded Flange Material: Stainless Steel Outlet Port Shape: Round Outlet Quantity: 1 Outlet Type: 2 Bolt welded flange Overall Length: 28.25 IN Oxygen sensor location: Pre Catalyst Substrate Material: Ceramic 16479 (Right) Body Height: 4 in Body Length: 8 in Body Shape: Round Body Width: 4 in California Air Resource Board (CARB) Certified: No California Certified: No Converter Body Length: 8 in Converter Body Material: Stainless Steel Converter Quantity: 1 Inlet 1 Type: 8 Bolt Welded Flange Inlet Port Shape: Oval Inlet Quantity: 1 Inlet Type: 8 Bolt Welded Flange Material: Stainless Steel Outlet Port Shape: Round Outlet Quantity: 1 Outlet Type: 2 Bolt welded flange Overall Length: 29.75 IN Oxygen sensor location: Pre Catalyst Substrate Material: Ceramic Features: EPA Compliant Direct fit for installation onto existing exhaust system. Hardware included. 100% new. Made from premium quality materials to meet orginal spec