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.
54 Reviews Hide Reviews Show Reviews
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Excellent Product
Excellent Price
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What you'd expect.
Bought this unsure of what I'd be receiving since I had seen pictures of Riffraff "bag-type" pre-filters with a drawstring on them, but the current picture on the website didn't confirm or deny that. This is instead very similar to a popular brand of pre-filters in that it has elastic at both ends. Only giving it four stars because I've always had issues with elastic-banded pre-filters. After a few removals for cleaning and the underhood heat, the elastic tends to break down and requires you to get creative with zip ties to keep it sealed to the air cleaner.
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Good Cover
Easy install obviously, looks like great quality cover.
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6637 Cover
Ordered this product to cover the Donaldson Blue air filter in the 6637 kit.. as always Clay and his team deliver innovative and superior products!
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Looks good and easy enough.
Looks good and slid right over the filter no issues. Shipping was timely.
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Cover 6637
Keeps 6637 clean, looks great.
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Looks great
Plug seems well made, and looks great
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Prefilter
They are a good prefilter and easy to keep clean and save on the main filter
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Pretty good
Good prefilter and like availability in colors and logo on it but wish it was a little thicker
