Got a '99 A6 that I plan to keep for two more years. Need cats BADLY and don't want to dish out $1400 US to Audi for replacements. I found a brand called Eastern that makes inexpensive Cats for my A6 but can't find any reviews on them. I don't live or need Cali-approved cats, but I want to make sure I'm going to get reliable O2 codes for the best fuel efficiency. Any help would be appreciated.

Thanks.