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 Good fit
Posted by Marcus on Nov 10th 2020
A little tight getting on but that was expected, it looks great and provides extra protection from bugs and debris under the hood! RiffRaff is always number 1! Great American company. Thanks again RiffRaff
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5 Keeps filter clean
Posted by Derek on Aug 13th 2020
This looks good and works great
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5 Fits well, breaths fantastic.
Posted by Brian on Aug 3rd 2020
Made a big difference in boost
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5 Nice addition to all my other riffraff upgrades,a definite must have if your running the 6637
Posted by Steven on Dec 31st 2019
Affordable top shelf products,excellent service
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5 Excellent Product
Posted by James on Dec 10th 2019
Excellent Price
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4 What you'd expect.
Posted by GW on Dec 9th 2019
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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5 Good Cover
Posted by Unknown on Aug 19th 2019
Easy install obviously, looks like great quality cover.
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5 6637 Cover
Posted by D. Mo on Oct 26th 2018
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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5 Looks good and easy enough.
Posted by Unknown on Aug 29th 2018
Looks good and slid right over the filter no issues. Shipping was timely.
