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.
70 Reviews Hide Reviews Show Reviews
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6637 air filter kit and cover
Awesome . Looks great and you can hear the Turbo . Will buy again for other prouducts .
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Quick fix
Had some critters chewed the yellow cover. The blue one looks great and these covers really keep out the dirt. My 6637 filter was still all white.
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Looks great!
I ordered the whole 6637 kit with filter cover and my dad did the DIY. He liked the cover so much I got him one for Christmas. Makes 2 more happy customers.
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True Blue
This cover is the best fit you will get for your filter, the design of the cover is far superior to any other cover available . there is a good color range for this cover too.
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Great fitment, looks even better
Keeps the crap and the H2O out of our 6637 filters. Looks cool, too.
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Fits Even Better Than the Earlier Ones I Got!
Fits my 6637 filter just great! I got one a while ago and it was a little tight but this one fits perfect! I don't know if you guys adjusted the size or not but the one I just got fits awesome! Keeps the larger particles out of the filter. Looks awesome too!
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Another Great Product
Nice fitment and looks good under the hood.
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Good Prefilter protection.
Going off pavement kicks up a lot of debris. This should be more than enough to keep the filter clean of larger particles. Plus it looks amazing!
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nice addition to filter
Figured I'd buy the Sock with the $$ I saved not buying from NAPA
