I just bought a magnaflow muffler from my friend for 60 bucks and i was looking online for a magnaflow high flow cat on ebay i was just wonder the length and if there should or should not be a sensor on the cat i have a 98 SE and i live in ny and my car is not cali spec if that makes any diffrence what so ever thanks in advance

 

why don't you use an o2 sim and delete the cat altogether

 

whats and o2 sim what does it do how much is it and where can i get one and o and will it pass emmissions

 

bump bump is this that dumb of a question that no one is answering <~first time doing my exhaust just need to know if when getting the magnaflow cat i was looking at should i get it with an o2 sensor hole or with out and how long the cat should be cause there were diffrent length magnaflow cats thanks