Riffraff has the best prices around on these replacement filters. Why go anywhere else?

Surprised at how big it is compared to the stock filter element. Everything fit where it was supposed to. The only thing is I bought a 4" coupler from Home Depot and it was too big. Need 4" tubing for a proper fit. It just looks awesome and I can see how it's an upgrade.

I have been using 6637 since 1999 , Can't guess how much fuel I have saved. Thanks FTE for introducing me to Riffraff

Best filter for the money, you won't find a better price or get better service. Buy two at a time and save some money on shipping!!!

Handles my 160/100 and 38R great. Pulls filter minder when restriction builds. Great price too:

Friendly service and fast shipping. great product for the price!

Great customer service.

I love this product, it's super easy to order and also has a great price point. The shipping couldn't be any faster which is awesome. I run it on my '02 7.3 and also on our '99 24v and it works really well for both pickups. Took a bit modifying for the 7.3 since it doesn't fit in the stock air box but it was well worth it.

easy install fast shipping decent price and plenty of filtration and volume!