what's the difference between the AF1 intake and the K&N 77 series intake for 97 and up f-150's?

 

There are many. K&N has been around very long and pretty much sets the bar for quality air intakes. They back up their product pretty good. The 77 is a polished chrome aluminum pipe with a 6 inch filter at the end. The AF1 is a polished stainless steel pipe with a 3 inch filter. I like the looks of the K&N. Either one will yield about the same gains, but I trust K&N more. Someone will come along soon to chime in their opinion. Just my 2 cents

 

Take A look at the brute force intakes. No need to oil the filter..

 

I like the AF1 for my 04 *big noticable power gain

 

The Air Force 1 is the recommended CAI from Troyer Performance and they haven't let me down thus far. Click below for the gallery with pics of my AF1.

Good luck whatever you choose though!

 

How long did it take you guys in install your AF1s?

 

About 45 min to install the AF1

 

took me about an hour

 

it took me about two hours to install my 77 series. gotta do it right though