Would a K&N intake out of a 99 5.4 fit a 98 4.6?

 

YES, however the "gotts intake" mod would perform better and cost way less

 

Yes they are interchangable for that generation.

 

what is the 'gotts intake' mod?

 

https://www.f150online.com/forums/ar...3-f-150-a.html

 

Ok thanks so that will help add performance. Now I dont get how to remove the air silencer (which i think is located right after the throttle body spacer but before the airbox) I also want to remove that so it will sound better and all.