Catalytic Converter
 

My son just came to me and told me his check engine light was on , so I jumped into it and took it to auto advance so they could tell me what was wrong with it, the salesman told me the car has two catalytic converters and it's the first one, the one with the bend (whatever that means.) He also told me it's not something I can get at a parts store. So is this something I have to get from a dealer or can i find places online or ebay and order it there? If so does anyone know exactly what that part is called so i won't be referring to it as catalytic converter the first one or one with the bend. Oh by the the way it's a : 1998 Plymouth Breeze 2.0