What does the inner diameter of my air filter need to be to go on a 5 inch intake pipe?

You'd have to go out and measure to be safe, but it's pretty common for 5" steel intake pipes to have an outer diameter of 5".

So a filter with a 6 inch inner diameter is what I need

If you're wanting to clamp the filter on your intake pipe, you'll wanna make sure the flange diameter is the same as the outer diameter of the intake tube.  So if you're intake tube is 5", you'll want a air filter with a 5" flange, like this one.

 

https://powerdrivendiesel.com/product/power-driven-performer-air-filter-5-inlet/

A 5" i.d. outlet on a filter goes on a 5" o.d. pipe.

Ok just checking who makes the best non oiled filter?

how much air do you actually need?  in CFM?

That is nothing more than a matter of opinion. I have used airaid, baldwin and aem.

Truck is stock so just something reliable I've had oiled filters never cared for em

Sorry I should have said those were all dry as well.

If you are stock then it is hard to beat any of the BHAF's  just choose one of the below.  
 

 

This is my set up filter is s@b

I am confused, but do you need a new filter?  Nothing wrong with a S&B just over sized for your setup.

 

I just need a new filter and yea that's a 10 inch long filter.

If it was me I would find the cheapest route

 

1. buy another s&b fitler

2. ANother source for filter

3.OEM tube and BHAF

 

I don't think any of those choices are wrong since you are stock.  

I run s&b dry with a filter wrap lol i like it 

i have plain old bhaf connected to stock tube, with a wrap. still running great!