build your own for less than $100.
@ the manzo: you do realize that a cai is not going to gain any type of significant increases. This is a 4k lb suv shaped like a brick, it's not like a honda where you can throw on an intake and a fart muffler and be cool.
However if you like the body lines and are not concerned with getting down the road very fast, then the explorer is for you.
To speed up the next round of questions, fast equals v8 motor swap.... break out the check book. (the easiest) more advanced is listed throughout the forum (expensive) to go fast with an explorer is NOT cheap.
PLEASE SEARCH next time.... there is a MASSIVE thread on the modified explorer section on building a cold air intake.