6637 gains?

[Sxr212]

I'm thinking about putting a 6637 filter in and was wondering what kinda gains you guys are getting.


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[351fifty]

huge ones, well worth it, what are you running now? i could instantly notice throttle improvement, and could hear the sweet sound of the turbo whistle

[dcaddy]

Originally Posted by 351fifty

huge ones, well worth it, what are you running now? i could instantly notice throttle improvement, and could hear the sweet sound of the turbo whistle

X 2.... just do it and never look back. Your truck will thank you.


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[Sxr212]

Well I found a k&n intake for like a silverado that I had laying around. I cut the tube down a little and put the filter on and it works ok, not huge gains but did notice the sweet turbo sound. I think it's not getting enough air through the filter cause it's only like 8" long and the biggest part is like 6".


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[85_305]

Holy****. Sometimes I feel like I"m in the Twilight Zone.

Take of the k&n; it will dust your turbo and your. Not to mention, there isn't one k&n made that will flow enough for our diesels.

[Sxr212]

Ok so I'm gonna buy it today! Thanks for the input!


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[85_305]

No problem. Before you buy it, cross referance the 6637 at your local napa because sometimes they are cheaper than fleetfilter is.

[351fifty]

my first filter was a fram ca8037, thing worked great honestly, and has an 850 cfm rating iirc, which is the same as our turbo's are, i noticed good gains with it as well, but when a buddy game me a free AFE intake and 6637 filter i immediatly used it instead, and works even better.

[mjonesjr]

Originally Posted by 351fifty

my first filter was a fram ca8037, thing worked great honestly, and has an 850 cfm rating iirc,

The WIX equal to the Fram CA8037 has a flow rate of 250 CFM. I'd say its a safe bet that the Fram one does too.

FRAM - Part Details
Wix 46441 & Napa 6441 Air Filter: FleetFilter Secure Online Store


I'd recommend the AFE Big Boost filter if you are doing the DIY air filter or if you are going to run a Tymar kit. The AFE Big Boost is rated at 850 CFM, which are turbos are rated for 750 CFM per Beans.

[85_305]

Originally Posted by mjonesjr

The WIX equal to the Fram CA8037 has a flow rate of 250 CFM. I'd say its a safe bet that the Fram one does too.

FRAM - Part Details
Wix 46441 & Napa 6441 Air Filter: FleetFilter Secure Online Store


I'd recommend the AFE Big Boost filter if you are doing the DIY air filter or if you are going to run a Tymar kit. The AFE Big Boost is rated at 850 CFM, which are turbos are rated for 750 CFM per Beans.

I agree... I dont think that fram can flow nearly enough for our motors. I've tried researching that filter and couldn't pull up any flow stats.