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Duramax Third Generation: 2006-2007.5 (LBZ & LLY) Discuss the third generation (2006-2007.5 LBZ & LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. Engine related discussion ONLY.

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Old 07-31-2019, 02:14 PM   #1 (permalink)
tork
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I bought an LBZ and it has a K&N.. options?

What to do....I don't want to deal with the oiled K&N filter on my LBZ. I've considered changing the intake and air filter housing back to stock, but I can't find the used parts in Alaska.

Are there options for a simple replacement paper filter to replace the oiled filter while leaving the K and N intake tube etc?

The K&N filter cleaning and oiling looks like a hassle- I'd much rather have a stock set up or at least a filter I can easily swap when dirty.

Any ideas?

Thanks

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Old 08-01-2019, 04:21 AM   #2 (permalink)
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https://truckpartsinventory.com/ try them

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Old 08-01-2019, 08:56 AM   #3 (permalink)
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I have 3 AFE oil type filters, I R&R with a clean filter then after I have 2 dirty ones I’ll clean them during at my leisure time.
I will never run a stock paper filter in any vehicle I own, to much restriction.
Cooler egt’s and quicker cool off time before shutting the engine down proves this to be true.
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Old 08-01-2019, 08:56 AM   #4 (permalink)
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Do you have this one? K&N CAI (57-3057)
I think your looking for Flange ID the most for fitting.
https://www.sbfilters.com/replacemen...filters/r0921d
FLANGE ID 6”
FLANGE HEIGHT 1.75”
TOP WIDTH 5.25”
BASE WIDTH 7.5”
ELEMENT HEIGHT 7”
TYPE OF TOP
BLACK URETHANE (RUBBER) W/ S&B LOGO
TYPE OF MEDIA
DRY DISPOSABLE MEDIA
TYPE OF FLANGE
TRADITIONAL

https://www.amsoil.com/shop/by-produ...nt%2feaau.aspx
https://www.amsoil.com/shop/by-produ...rs/?zo=1726278
(EAAU6075-EA)
Dimensions and Applications
K&N Equivalent Part Number:RF-1041
Product Style: Round Tapered
Base OD: 7.5"
Flange ID: 6"
Flange Lenght: 1"
Flange Type: Centered
Media Height: 7.5"
Top OD: 5”

Last edited by Rvn4me; 08-01-2019 at 09:06 AM.
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Old 08-01-2019, 04:17 PM   #5 (permalink)
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Stock filters have been proven to outflow the K&N junk...I will see if I can find the link.
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Old 08-01-2019, 09:44 PM   #6 (permalink)
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Quote:
Originally Posted by sfcjones View Post
Stock filters have been proven to outflow the K&N junk...I will see if I can find the link.
Here is the link you are looking for.
https://www.dieselplace.com/forum/3-...they-work.html

I have used K&N on my previous gasser. Never again. They let in too much fine grit. Also, the oil eventually fouls the MAF sensor. Bottom line from the above link is that NO after-market filter offers any performance, mileage, or turbo-spool-up advantage over the stock on any duramax with less than 500 rear wheel horsepower.

Here is a quote from the link:
(Arlen) SPICER wrote,
“Now that I am not doing the tests and my objectivity is not necessary, let me explain my motivation. The reason I started this crusade was that I was seeing people spend a lot of money on aftermarket filters based on the word of a salesperson or based on the misleading, incomplete or outright deceiving information printed on boxes and in sales literature. Gentlemen and Ladies, Marketing and the lure of profit is VERY POWERFUL! It is amazing how many people believe that better airflow = more power! Unless you have modifications out the wazoo, a more porous filter will just dirty your oil! Some will say " I have used aftermarket brand X for XXX # years with no problems. The PROBLEM is you spent a chunk of ching on a product that not only DID NOT increase your horsepower, but also let in a lot of dirt while doing it! Now how much is a lot? ANY MORE THAN NECESSARY is TOO MUCH!
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Last edited by Oregonnovaguy; 08-01-2019 at 09:51 PM.
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Old 08-04-2019, 03:43 PM   #7 (permalink)
tork
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k and n 57-3057

Yes, Rvn4me I have the K&N 57-3057. Thanks for the reply.

The prior owner installed a PPE tuner but I have it at the lowest setting, and the exhaust is 4 inch but prior owner did not delete EGR, and there is no CAT.

I'm not interested in added performance, just want reliability and longevity in the truck. In fact, I'd prefer the truck was stock, but that's another story.

After reading Spicer et al I believe my best option is an Amsoil EA filter as you referenced. Apparently Spicer is running one as well. I'll order up!

Amazing forum. Thanks to all for the help-

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Old 08-04-2019, 04:01 PM   #8 (permalink)
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You don't need a tuner with the cat deleted.
Tuner is only needed if you want to delete or block the egr.
Considering your more interested in having it stock why don't you just put it back to stock.

For me I would never run a K & N in a turbo powered engine, but gassers I've never had any problems.
Gassers MAF g/s is in the 5-8 g/s flow idling.
My Dmax turbo powered diesel is in the 38-41 MAF g/s idling, which K & N doesn't handle very good, overtime they will thin out allowing more airflow or come apart.
We've had this happen on a 7.3 turbo powered powerchoke.
Right now I have 4 gassers with K & N airfilters.
But my Dmax I have aFe in my signature.

That link is a little outdated like 12 years outdated.
Cutting a opening in the front of the box is a bad idea, all your doing is allowing hot engine compartment air taking over the cooler air coming in from the fender.
If you want a true DIY CAI with only cooler air being pulled in check out this link, sure its 12 years old but still works a heck of a lot better even today.
https://www.dieselplace.com/forum/71...quick-how.html
I went a little farther and opened up the inside fender to match the opening of the airbox setting up against the fender.


Compare AAT temps to IAT temps with a stock filter vs a good quality aftermarket airfilter, then you'll know the truth.
You'll also notice a little quicker throttle response with aftermarket.
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Last edited by D_R_C; 08-04-2019 at 04:18 PM.
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Old 08-05-2019, 10:40 PM   #9 (permalink)
tork
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Just replace the oiled K&N with the new Amsoil paper filter, and leave the K and N box and tube, correct?

Well, I've got a bunch to learn! Not sure I understand...Are you saying the PPE is ineffective if there is no CAT? If I crank the PPE to the highest setting there seems to be a huge difference in power.

I read that running the PPE on the LBZ at setting 90hp will deliver better fuel economy than stock. That's what I've been running (not the lowest setting as I initially thought), but I'm not sure it really helped. The biggest difference in fuel economy happened when I dumped those 275-70-18 Nitto tires for 235-85-16. Yep, you read that right...skinny tires, but they are perfect for my application and I gained an easy 3mpg over the larger tires.
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Old 08-06-2019, 12:13 AM   #10 (permalink)
D_R_C
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Your the one that said you’d prefer it was stock.
Most people tune for more power and deleting emissions stuff, if the tuner does deletes.
Cats add a little back pressure, most will delete the cat.
I deleted mine, but put it back on after about 5 years dealing with real stinky choke and puke exhaust fumes.

Adding 90 hp will help not only with mileage, but will also assist in possible early trans and engine failures, save your money or check out getting a home equity loan.
Being new at this, you might consider going to a much smaller hp tune.

Are you absolutely sure only the tires made a difference with mileage or could it be your speedo is off by 3 mph ? Enter your tire sizes to confirm the mph differences.
https://www.discounttire.com/learn/tire-size-calculator

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2007.5 GMC "Black" Sierra SLT 3500HD SRW C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-route
AirDog 4G100


2007 GMC Yukon Denali "BLACK" 6.2 gasser, DIY stock airbox mod, K & N OEM drop-in, Airaid intake tube, EFILive TCM tuned

Last edited by D_R_C; 08-06-2019 at 12:18 AM.
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