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 Cover 6637
Posted by Schroeder on Apr 30th 2018
Keeps 6637 clean, looks great.
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5 Looks great
Posted by Jay Z on Apr 3rd 2018
Plug seems well made, and looks great
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5 Prefilter
Posted by Bill on Feb 7th 2018
They are a good prefilter and easy to keep clean and save on the main filter
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4 Pretty good
Posted by Unknown on Aug 21st 2017
Good prefilter and like availability in colors and logo on it but wish it was a little thicker
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5 6637 Cover
Posted by Terry on May 1st 2017
Well made fits nice & looks good.
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5 Nice cover
Posted by Unknown on Apr 28th 2017
A great way to dress up the engine bay and keep bugs out of the filter.
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5 Great product
Posted by Steven on Mar 20th 2017
It was really easy to install and was very happy with the product.
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5 Posted by Zachary on Mar 11th 2017
Very happy with the fit and function. Shipped across the country in a timely manner
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5 NICE COVER
Posted by Unknown on Feb 3rd 2017
I ordered the red cover mainly for the look. Not really needed especially if you order the afe filter since it is blue in color. The red adds a nice touch to the engine compartment and also aids in keeping anything large from getting wedged in your filter pleats. Get one.