aFe PowerMagnum FLOW Universal Air Filter w/Pro 5R Oiled Media - 4" Inlet, 11" Tall - #24-91042

Quality and build is much better, can hear it a bit more

If you are running a 6637 style bhaf on your truck, you should do yourself a favor and switch to this filter. On the ol' 7.3 with sxe366 and 238/80 sticks she used to have a consistent very slight tailpipe haze visible at night in tailgater's headlight beam and soot buildup on the bumper, doesn't happen anymore with this filter. Tailpipe spews clean as a whistle and throttle response is much better.

I love these filters. They are durable and designed with a long haul and mass air flow in mind. These will out perform your standard 6637 filter from Napa that is a basic paper filter. They will out perform and last longer then the 6637 Napa gold filter. Granted this is a little more expensive completely worth it for versatility and performance.

This is a nice air filter, I'm happy with the fit and performance. It came "pre-oiled" it showed up a light blue. I installed it, but within 2 weeks it was turning gray/ white. Within a month almost all the color was gone. I ordered a recharge kit ($40) and cleaned and heavily oiled it. So my only real complaint is that it wasn't oiled very well from the factory, I definitely expected more then 3k miles out of it.

Don't review alot, but figured I'd help someone save some money. I have been through several air cleaner setups on my late 99 7.3 , and this one is the winner. Originally had a spectre brand air box setup style cold air with this style filter, was a huge improvement over stock, but would still bottom out the air filter restriction gauge on medium to full throttle pulls. Switched to a 6637 setup , with the donaldson blue 6637. Was alot louder than previous setup, but actually seemed slower. And for the first time I actually noticed soot from my exhaust on my back bumper, too rich. Immediately ordered and tried this filter, and even under hard full throttle runs the most I've seen the restriction gauge hit is slightly over 50%, and that's with a pre filter sleeve on it. Was a huge improvement in acceleration from dead stops and a bump in fuel mileage compared to the donaldson 6637. If you plan on going open element/6637 style, this is the best flowing. However, as with all these style elements, pay attention to wear. They are washable, but don't last forever. If you notice tiny pin holes , its worn out, get a new one. Don't dust your motor because you're cheap. Or too lazy to wash it once in a while.

Bought this filter after I put a KC stage one on my 7.3 powerstroke because its what they reccomend. I was running a Donaldson blue 6637. This filter definitely flows more is way less restrictive, builds boost faster, and lowered my EGT'S. Great buy would definitely do it again. Its also cleanable which is nice and will last quite a long time.

Huge, twice the size of the k&n it replaced. It is awesome and sucks air.

Swap out my 6637 filter and has a big improvement in throttle response and my turbo sounds amazing now in my 2002 7.3

It fits good on my 2001 7.3L f350 and I like the power it's giving