I have read and learned alot but I still have a few questions that I need an answer too...
Will a carsound cat throw a CEL? I know my old car did but I dont know the placement of the 02 sensor on a prelude?

I bought my prelude with AP1 rims on it I found out, how much are these worth to sell and are they a good choice compared to a lightweight enkei or 5zigen?

Lastly, Does anyone know somewhere in Missouri or southern Illinois where I could get a tune? Thanks alot.