is it best to use a cone k and n filter and do away with the air box or just a k and n filter for the sock air box.

 

Call Sal at Psp, he is the man that has been on top of the Gen 1 Lightnings since day one. Not meaning to step on any of the other tuners toe's, but facts are facts

 

http://www.powersurgeperformance.net...28All+years%29

 

Personally I like the ghetto (read home made) air intake. What you do is get a drop in K&N filter and run some piping or ducting hose up into the airbox to help bring more cool air in there. It retains a factory look, does work, and isn't expsensive.

[edit]
read this thread to see some pics and learn some more:
https://www.f150online.com/forums/sh...threadid=66157