For drop in filter you do not need any extra modification, just drop it in like your OEM filter and you are ready to go.

As for open pod a.k.a. mushroom type filter, a lot of things need to be taken into consideration to extract the full potential.
You need to install a proper heat shield to shield the filter from the heat generated by the engine, if not the air filter cannot be run at its maximum capacity.

Final consideration is that how much you willing to spend and what is the gain in horse powers you looking at

This post has been edited by quiksilve: Jul 5 2007, 05:30 PM