Made to high standards, these covers are designed to extend the life of your air intake filter while also giving you a way to visually see the amount of dust collected. The covers work equally well on both oiled and non-oiled filter elements to prevent larger debris from prematurely reducing critical air flow to your engine.
Installation Note: Take care installed over filter elements with metal cages as a metal snag can tear your cover.
72 Reviews Hide Reviews Show Reviews
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Great Addition to the Riffraff Diesel 6637 Filter
Got the Riffraff Diesel 6637 Filter Kit and installed it the same day. Did exactly what I read about on all the web sites. Way better than the stock unit on my 16 year 193,000 plus mile 7.3L F250. Great price too.
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Love mine so much, I grabbed a spare!
These covers do their job. I just checked my filter, and while it's getting close to time to change it, it definitely has life yet left in it after a bunch of miles. I had a battery incident that spattered stuff all over the place and singed the cover, so I grabbed a second one just in case!
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Great product
Looks great on my truck and I'm proud to show off the Riffraff logo!
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6637 cover and filter
looks fantastic buy it and simply to install the two really lit up the 7.3 with 280000plus miles. Have no doubts on the quality of this filter combo!!!
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STOP LOOKING AND BUY IT
Fits perfect and looks great under the hood! Makes the 6637 go a lot on her
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Pretty Blue
Nice cover , it will keep the big stuff out and protect my investment.
I may restrict some air flow but barely noticeable, looks cool and works a treat. -
Great product
Looks great works great what more could I ask for
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Nice cover
Cover fits nice and snug around the filter and looks good too.
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Good quality
Cover is of thick material but still allows plenty of air flow
