Your best bet is going to be go to the Intake/Exhaust section, and read the stickies that are at the top for a reason. Then go through and pick out all of the <50 post '
Which is the best exhaust?' threads. This question has been asked numerous times. And now I'm fairly certain we have every single taste/look/wallet combination identified as which would be the best for them.
Or the Search feature is a great tool to help you figure out where to look instead.