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Old 02-03-2019, 02:29 PM
yogr yogr is offline
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Default Which 6637 filter

I was going to order a new air filter and I noticed that riffraff sells a white 6637 and a blue 6637 that is supposedly made of a better quality material.

I was wondering what everyone's opinion was on the blue filter, and if it's worth the extra cost.

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Old 02-03-2019, 07:45 PM
Gnathv Gnathv is offline
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Yes it’s worth the extra, noticeably more cfm.
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Old 02-04-2019, 05:01 AM
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The white one will filter better and flows enough air on a 7.3 to make plenty of power unless you are shooting for well over 500hp. The blue one is a "high flow" version that if you live in any sort of dusty conditions, it will dust your turbo.

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Old 02-04-2019, 06:59 AM
yogr yogr is offline
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Thanks for the replies guys, it looks like I'll stick with the white one for now as I'm completely stock other than a tune.

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Old 02-04-2019, 05:47 PM
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If you want a better filter than the 6637 google up Donaldson B085011. The Donaldson was what was first used as a open air filter on these trucks and is a better filter than the NAPA 6637 and if you look around you can find it cheaper.
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Old 02-04-2019, 06:28 PM
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lincolnlocker lincolnlocker is offline
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Quote:
Originally Posted by Bugman View Post
If you want a better filter than the 6637 google up Donaldson B085011. The Donaldson was what was first used as a open air filter on these trucks and is a better filter than the NAPA 6637 and if you look around you can find it cheaper.
Only thing different is the Donaldson is hydrophobic... which is a big plus. Same filtration and flow though.

live life full throttle
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15,f350,4x4,cclb, not stock
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