Best Intake for a 97 PSD

[7.3 on 40s]

I currently have a 3 inch dp. 3.5 inch mp. 5 inch stacks. ZF5 tranny. 4.56 gears. Truck runs great and very happy with the power. Checked my air filter which is a K&N inside the factory airbox and it looks filthy. I was thinking of getting that stock airbox out of there and want to know whats the best way to go.

-stock airbox with clean K&N
-6637 intake mod
-aftermarket cold air kit

[351fifty]

afe all metal ftw

[Moto2four]

If you don't want to spring for a full intake like the afe or s&b, go with the 6637. Last thing I'd run would be k&n

[erics diesel]

^^ agreed for the cost the 6637 is the way i would go

[ol_Blue97]

yup.. 6637

[7.3 on 40s]

Why do you say last thing would be a K&N. I always thought K&N was not an issue as long as the vehicle is not MAF. Just wondering. I am kinda on a budget with my house remodel and all so the 6637 mod seems like it would be the way to go.

Can you explain to me a bit what needs to be done. It doesnt seem like much. First off what stores can get you the part number 6637 if you ask them. How much is the filter 40-50? For the install it seems you need a small elbow. Can i use pvc? Being the fact my truck is white, a white pipe and white filter wouldnt look to bad. Diesel doesnt seem to run hot under the hood like a gas motor. I would think pvc would hold up.

Thanks for all your help.

[erics diesel]

The k&n filters let particles by that can dust your turbo. As far as the 6637 goes its a Napa filter or order it online and yes a piece of 45 degree pvc will work for the tube

[Moto2four]

Originally Posted by 7.3 on 40s

Why do you say last thing would be a K&N. I always thought K&N was not an issue as long as the vehicle is not MAF. Just wondering. I am kinda on a budget with my house remodel and all so the 6637 mod seems like it would be the way to go.

Can you explain to me a bit what needs to be done. It doesnt seem like much. First off what stores can get you the part number 6637 if you ask them. How much is the filter 40-50? For the install it seems you need a small elbow. Can i use pvc? Being the fact my truck is white, a white pipe and white filter wouldnt look to bad. Diesel doesnt seem to run hot under the hood like a gas motor. I would think pvc would hold up.

Thanks for all your help.

The k&n has a 2 ply filter that is far less efficient than the other options.

[7.3 on 40s]

Ok then. Ill get the stock airbox and k&n out of there. Ill call napa and ask for the 6637. I think ill use some large zip ties and secure the filter to the brace behind the battery. As for the pvc elbow is 4 inch what i need? I geuss i can also measure the openings.

[richardi503]

Riffraff Diesel makes a nice 6637 kit with everything you need, Around $90 if i remember right.