K&N drop in filter?

[fw12500w]

I have 2009 Dodge Challenger srt8 6 speed. the only thing I've changed is replaced the stock filter with a K&N. This just fits in the regular breather box.
Does this require a speacial tune? I did notice loss of fuel milage after K&N.
According to the car computer I'm down 2 mpg.

I used the standard stock tune. The car feels stronger but I'm just asking to see if it needs somehting different with the K&N.

Thanks

[mikel]

No need for a tune for the K&N Panel filter.

[fw12500w]

Thanks.

Which CAI is recommended for this car? I've looked at a lot of them.
Will a CAI make any difference w/o an exhaust upgrade?