6637 Replacement Cover - Red
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.
58 Reviews Hide Reviews Show Reviews
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5 6637 replacement cover air filter
Posted by JASON DELOOZE on Feb 11th 2025
Great, like how I can get them in colors to match my red theme engine bay
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5 6637 Cover
Posted by Bentley Fields on Sep 25th 2024
Definitely looks like it will extend the life of my filter. Looks awesome with all my other Riff Raff accents under the hood
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5 Air filter cover
Posted by David Kelley on Aug 30th 2024
Well made and easy to install! Great product!
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5 Filter cover
Posted by Powderhorn01 on May 25th 2024
Working great, easy to slide onto the filter
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5 Air cleaner
Posted by Dan Carlson on Jan 30th 2023
Great product
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5 Filter Cover
Posted by Ish on Jan 30th 2023
Great product.. Helps keep filter clean from big debris.
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5 Air filter cover
Posted by Jay on Dec 29th 2022
Looks great and washable the red looks good under the Hood
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5 RiffRaff Diesel 6637 Filter Cover
Posted by C Smith on Nov 20th 2022
Nice addition to the 6637 filter. Doesn’t look very restrictive to me as other reviews had stated. Looks like water would shed right off of it. Very easy to install and yes, the thread from stitching will hang up on the mesh around filter if you have to pull it back off for any reason. Looks to be the same color as my new RiffRaff Billet Plenums. It’s not as bright over the Donaldson Blue. Looks good, would buy again.
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5 Good quality
Posted by Sandor on Aug 4th 2022
Perfect for the filter
