Matatk wrote:
Headers are reversible if you ever sell the car. There are kits that will adapt right up with your stock exhaust.

There is a guy on here Higgyburners who sells some nice CNC machined air filter covers if you are interested.

I have the bypass because it makes it easier to work on my car. The airfoil is not necessary. If you decide to put it in, make sure you loctite the screw in so it doesn't back out and get ingested in your engine (has happened before!).