do you think its better to keep your cat or get rid of it? cause i have a 92 sentra and i dont know if i should get rid of it or leave it... what kind of gains does it give you if you get rid of it?

The se-r cat flows very well. I would suggest keeping in unless it is clogged ( :( ) or you go turbo. Then just get a catco high flow for $62. Withought it you wont pass emissions or just an inspection depending on the state you live in. Some people remove it and love it. Unless you are very well modded, just leave it be.