Just an easy question. Can you get this filter at a local AutoZone store, if so do you just ask for the filter by that name? Or is this something i would have to order online?

and is there any noticeable power increase or sound increase?

any help would be helpfull thank you.

 

Napa is were I got mine.

 

did you notice any difference after installing the filter

 

Just a little difference in sound ,I did some other things at the same time so it all made a diff.

 

just another quick question i am new to the site and to turbo diesel. but i was watching so light modded truck pulls the other day and after a hard pull as soon as the let off the throttle there is almost a blow off sound. is it just some crazy mods or am i missing something

 

That was probably unwanted boost coming back out the air fliter

 

Double post sorryyyyy.

 

Your stock air box is a piece of crap. The reason for the 6637 is because of its superior filtering, much better than stock. It will whistle loud because its not in a box, the filter also allows the truck to get as much air as your truck will ever need. That blow off sound is boost going back through the intake and filter. When you install the 6637 and you get on it hard and let up right before the shift you will here it also. Best place to get the filter is fleetfilter.com or napa. Autozone will probably not have it since it is for a generator or something wierd. I dont remember whats its from.

 

wow quick answers to any question. this site is great. would i just ask for a 6637 air filter at the store

 

I went to the counter at NAPA and asked for the filter part #6637 and they came out with the filter. $50.00 with tax. I started using DIESEL KLEEN and the 6637 at the same time and got 1.5 mpg increase. Easy install.

RICK

 

you can do some more research here http://www.7point3.com/Mods.aspx

 

I got mine from fleet filters for 30 bucks shipped, I love the sound it has everytime I let off the throttle or shift just right, that and a foil delete really helped my whistle.

 

Just did the 6637, Napa is the place. Will make some new noises with the mod. I do believe has improved my mileage and tows better in freeway.

 

If you have an O'Reillys, they have it a bit cheaper under the Wix part number. I paid ~$38 for mine there.

 

Seems like fleetfilter.com still has about the lowest price going.