Should I get a catted X pipe?
It depends. If you want to remain street legal (especially if emissions testing is performed in your area), then yes, you most likely do want cats. However, if you are looking for the most performance, cat-less designs will provide less backpressure. They will also provide a louder exhaust tone. If you choose to go cat-less, you will need MIL (Multi Indicator Light) eliminators to keep the check engine light off. Note that some X-pipes (such as the QMP X-pipe), include a replaceable section to allow for cats or cat-less fitment.
