Was time to replace my 6637 filter and decided to go with the AFE Big Boost filter. Not only is it reusable and washable in the future but man what a tremendous difference it has made on my '97 Powerstroke! You can definitely tell the difference as well hear the difference. Love the way I can hear my turbo grabbing air under hard accelerations! Very great product! Highly recommend!

By far the best flowing filter I have ever had on my truck. If you don't mind keeping up with washing it I highly recommend it.

Looks really good under the Hood! Can feel the difference!

Fit perfectly, trucks sounds sweet...
Thanks

Awesome

WOW, this is the best filter I've have on this truck for the life of me.
It lowers egt's and eot in my opinion, the whine i hear is no more than the 6637 i had previously.
I have a side snorkel directing cold air into the end of the filter so it works a treat.

Quicker spool, better mid range pulling power. but the turbo noise is a little tiring. but great product.

Turbo sounds better. Better fuel mileage

I have been looking for a year for one of these filter all I could ever find was the 6637 but you couldnt clean those. But big difference with performance definitely worth the money!