K&n And Mafs

capstone-ed · August 11, 2010

Im about to install a new K&N Cold Air Induction system and Flowmaster Dual Exhaust on my '08 5.3L Silverado. I have gotten conflicting reports about changing the MAFS. Should it be changed? If so, does anyone know the GM part #? Thanks

[email protected] · August 11, 2010

Im about to install a new K&N Cold Air Induction system and Flowmaster Dual Exhaust on my '08 5.3L Silverado. I have gotten conflicting reports about changing the MAFS. Should it be changed? If so, does anyone know the GM part #? Thanks

I don't know why you'd want to change the maf, usually after time the oil from a k&n will dirty the maf and it will require cleaning for best performance. But, I've never heard of changing a maf before you buy the k&n.

txab · August 11, 2010

No need to change MAF sensor. I would suggest getting a tune for your truck though. You'll get more bang for your buck out of a tune than most other things you can do to it

[email protected] · August 11, 2010

Yep, I also agree a tune is MUCH more worth your money than is a CAI.

Stevens03 · August 11, 2010

If your stuck on getting an intake kit, look at S&B filter kits as well as Volant. Both are true cold air intakes and offer a dry filter. Why your getting conflicting information is due to the fact that the K&N is a wet filter and people tend to over oil them after a cleaning which causes a problem with the MAF sensor getting oil on it. Nothing wrong with K&N but its really not a true cold air intake.

And.. like other suggested, getting a custom tune will yield more power than both exhaust and intake combined for less money. That being said, combining all 3 upgrades, puts a nice smile on your face

MacA · August 11, 2010

Why your getting conflicting information is due to the fact that the K&N is a wet filter and people tend to over oil them after a cleaning which causes a problem with the MAF sensor getting oil on it. Nothing wrong with K&N but its really not a true cold air intake.

The GMT900 series trucks have a re-designed stock air intake box that is very efficient at pulling in "cold" air (non-engine heated air). Unless an aftermarket CAI system has a snorkle/scoop included, the replacement boxes are virtually useless. Save your money and buy just a replacement tube which eliminates the stock noise suppression baffles and provides for a less restrictive delivery of air. I went with the Airaid MIT, but there are other options available. Then buy a good quality, name brand, drop-in filter for your stock air box. There is absolutely nothing wrong with K&N filters if maintained properly, but there are also excellent "dry" filters on the market as Steven suggested. These re-useable filters work very well and over time save you money from not having to buy disposable filters all the time.

The CAI by itself will not give you much of a performance advantage, but with a quality exhaust system and ESPECIALLY a quality tune, you can realize a very noticeable seat-of-the-pants improvement in performance. But more importantly...it will sound cool!

Jennabear · August 11, 2010

The stock MAF is good for 550+HP, no need to change it out. The aftermarket MAFs cause more harm than anything else.

After you install your new intake, be sure to clean your MAF, and check it everysooften for filter oil.

Jennabear · August 11, 2010

I don't know why you'd want to change the maf, usually after time the oil from a k&n will dirty the maf and it will require cleaning for best performance. But, I've never heard of changing a maf before you buy the k&n.

Just noticed your signature with your time in it. What mods are you running for that time with such a low trap speed?

BigBlueLB756 · August 11, 2010

1/8th?

[email protected] · August 11, 2010

I don't know why you'd want to change the maf, usually after time the oil from a k&n will dirty the maf and it will require cleaning for best performance. But, I've never heard of changing a maf before you buy the k&n.

Just noticed your signature with your time in it. What mods are you running for that time with such a low trap speed?

Yeah that was before I blew the heads of the 6.0l I previously had in their from using too much nitrous. Anyway, on that engine I had a supercharger combined with a 250 shot. There was also some weight reduction in that run. I now just have a stock engine with exhaust and intake and tune on it. I keep the supercharger and the nitrous kit in the garage now, cause it's just too expensive to ruin another engine. Because it wasn't drivable the way it was with a high stall and a thumping cam. I ran the same tires and wheels as I have on their now and they wouldn't hook up worth a crap. Anyway, that was about 5 years ago when I was young and just got my job and figured I could afford all that stuff. I'll have to get an updated track time next time I go to Jackson, Florida.

Jennabear · August 11, 2010

So the 12.98 was with the blower and nitrous? I was confused with it saying without a tune.

Matt_ · August 11, 2010

I don't know why you'd want to change the maf, usually after time the oil from a k&n will dirty the maf and it will require cleaning for best performance. But, I've never heard of changing a maf before you buy the k&n.

Just noticed your signature with your time in it. What mods are you running for that time with such a low trap speed?

Yeah that was before I blew the heads of the 6.0l I previously had in their from using too much nitrous. Anyway, on that engine I had a supercharger combined with a 250 shot. There was also some weight reduction in that run. I now just have a stock engine with exhaust and intake and tune on it. I keep the supercharger and the nitrous kit in the garage now, cause it's just too expensive to ruin another engine. Because it wasn't drivable the way it was with a high stall and a thumping cam. I ran the same tires and wheels as I have on their now and they wouldn't hook up worth a crap. Anyway, that was about 5 years ago when I was young and just got my job and figured I could afford all that stuff. I'll have to get an updated track time next time I go to Jackson, Florida.

did i read that right??

supercharger + nitrous + cam.... but you claim "no tune"?

dlstewart01 · August 11, 2010

Why your getting conflicting information is due to the fact that the K&N is a wet filter and people tend to over oil them after a cleaning which causes a problem with the MAF sensor getting oil on it. Nothing wrong with K&N but its really not a true cold air intake.

The GMT900 series trucks have a re-designed stock air intake box that is very efficient at pulling in "cold" air (non-engine heated air). Unless an aftermarket CAI system has a snorkle/scoop included, the replacement boxes are virtually useless. Save your money and buy just a replacement tube which eliminates the stock noise suppression baffles and provides for a less restrictive delivery of air. I went with the Airaid MIT, but there are other options available. Then buy a good quality, name brand, drop-in filter for your stock air box. There is absolutely nothing wrong with K&N filters if maintained properly, but there are also excellent "dry" filters on the market as Steven suggested. These re-useable filters work very well and over time save you money from not having to buy disposable filters all the time.

The CAI by itself will not give you much of a performance advantage, but with a quality exhaust system and ESPECIALLY a quality tune, you can realize a very noticeable seat-of-the-pants improvement in performance. But more importantly...it will sound cool!

What year did the GMT900 get a redesighed air box...The 2007 and 2008 are the same part# as the GMT800...

From MS3DALE...

Rich,

What is the part number for the air box/housing? I've looked on Gmpartsdirect but can't find it anywhere. Thanks.

25873812,This is for the GMT800 and 900 trucks,and includes the "K47" high-capacity air cleaner element,SO there is a different part number for "non-K47" trucks because the element is included.

But again,the box/housing/lid is the same from a K47 to a "non" K47 truck.

.justin. · August 11, 2010

Why your getting conflicting information is due to the fact that the K&N is a wet filter and people tend to over oil them after a cleaning which causes a problem with the MAF sensor getting oil on it. Nothing wrong with K&N but its really not a true cold air intake.

The GMT900 series trucks have a re-designed stock air intake box that is very efficient at pulling in "cold" air (non-engine heated air). Unless an aftermarket CAI system has a snorkle/scoop included, the replacement boxes are virtually useless. Save your money and buy just a replacement tube which eliminates the stock noise suppression baffles and provides for a less restrictive delivery of air. I went with the Airaid MIT, but there are other options available. Then buy a good quality, name brand, drop-in filter for your stock air box. There is absolutely nothing wrong with K&N filters if maintained properly, but there are also excellent "dry" filters on the market as Steven suggested. These re-useable filters work very well and over time save you money from not having to buy disposable filters all the time.

The CAI by itself will not give you much of a performance advantage, but with a quality exhaust system and ESPECIALLY a quality tune, you can realize a very noticeable seat-of-the-pants improvement in performance. But more importantly...it will sound cool!

What year did the GMT900 get a redesighed air box...The 2007 and 2008 are the same part# as the GMT800...

From MS3DALE...

Rich,

What is the part number for the air box/housing? I've looked on Gmpartsdirect but can't find it anywhere. Thanks.

25873812,This is for the GMT800 and 900 trucks,and includes the "K47" high-capacity air cleaner element,SO there is a different part number for "non-K47" trucks because the element is included.

But again,the box/housing/lid is the same from a K47 to a "non" K47 truck.

The MAF sensor design changed in 2009, causing a need to redesign all intake systems.

dlstewart01 · August 11, 2010

Why your getting conflicting information is due to the fact that the K&N is a wet filter and people tend to over oil them after a cleaning which causes a problem with the MAF sensor getting oil on it. Nothing wrong with K&N but its really not a true cold air intake.

The GMT900 series trucks have a re-designed stock air intake box that is very efficient at pulling in "cold" air (non-engine heated air). Unless an aftermarket CAI system has a snorkle/scoop included, the replacement boxes are virtually useless. Save your money and buy just a replacement tube which eliminates the stock noise suppression baffles and provides for a less restrictive delivery of air. I went with the Airaid MIT, but there are other options available. Then buy a good quality, name brand, drop-in filter for your stock air box. There is absolutely nothing wrong with K&N filters if maintained properly, but there are also excellent "dry" filters on the market as Steven suggested. These re-useable filters work very well and over time save you money from not having to buy disposable filters all the time.

The CAI by itself will not give you much of a performance advantage, but with a quality exhaust system and ESPECIALLY a quality tune, you can realize a very noticeable seat-of-the-pants improvement in performance. But more importantly...it will sound cool!

What year did the GMT900 get a redesighed air box...The 2007 and 2008 are the same part# as the GMT800...

From MS3DALE...

Rich,

What is the part number for the air box/housing? I've looked on Gmpartsdirect but can't find it anywhere. Thanks.

25873812,This is for the GMT800 and 900 trucks,and includes the "K47" high-capacity air cleaner element,SO there is a different part number for "non-K47" trucks because the element is included.

But again,the box/housing/lid is the same from a K47 to a "non" K47 truck.

The MAF sensor design changed in 2009, causing a need to redesign all intake systems.

Thanks, I knew it had to have been recently.