CTA intake - 3" intake with open air element can be found at
www.ctamotorsports.comResonator- if removed will make the exhaust a little deeper on a stock system, good for a couple HP...well maybe.
Chip- is $250 but gives a little more umph (advanced timing)and gets rid of limiters, rev and speed. Ebay things are a rip off, stay away from them.
The UDP does not affect anything. Gives you car a few more horses and revs faster.
All these things do not really affect your gas mileage. IT actually helps it due to the fact to get going you don't have to floor it like stock.
If you stomp on it constantly, then your gas mileage will suffer.
