this item comes two piece to make it easier to ship and install. Mercedes E320 Catalytic Converter. **** 100% EPA compliant **** Fits all 1998 through to 2002 rear wheel drive 3.2L 6cyl gasoline engine models. This unit replaces the factory left side converter on RWD models listed above. item features a provision for 2 O2 sensors, and 2 highly loaded converter units, NO emissions problems whatsoever. replace your defective factory unit directly with this item, no welding required, simply bolt-in. NOTE item may ship in 2pcs depending on your shipping location. THIS ITEM IS LOCATED ON THE DRIVER'S SIDE ( LEFT ). this car also has a right side, email us if you need the item #. IF YOU HAVE THE ALL WHEEL DRIVE 4MATIC MODEL EMAIL US FOR THE CORRECT ITEM *PREMIUM DIRECT-FIT ? HIGH QUALITY MATERIAL ? OE STYLE & PERFORMANCE** BRAND NEW!!!