Hey i need to replace my cat on my accord. (over 100k miles so no warranty). Does anyone have any suggestions for me? I see alot on ebay for like 30-60 bucks but it seems that they are all some type of high flow cat. I dont know much bout cats so any help is usefull. Ultimatley i dont want to have my check engine light and the infamous p0420 error. I would like to also know if im taking a huge hit to milage for an aftermarket cat. OEM cats run abotu 150 a pop from what ive seen... thanks in advance for the help