I was wondering if I could use a napa 6637 on my 97 powerstroke and if it uses the stock air box. Any other filter choices that would be good?

 

If you use the 6637 filter you will need to remove the stock air box. The most important thing you need to know is "get rid the stock air box". They allow unfiltered air into the turbo, dusting the blades. There are a few aftermarket airbox/filter combos you can use but they are expensive. The 6637 aka 'kwik filter' is by far the cheapest.

 

Does the 6637 come with a new airbox and if not where can I get one that will work for the 6637?

 

You dont need any. the filter is placed as it comes, without any box


Its a very good upgrade, after that a down pipe 3".

Regards
Jose

 

Thanks guys for the help!!

 

Sounded like a good cheap mod. Bought one yesterday with the following results...

1. The connection from the NAPA 6637 is the same size as the rubber connector connector to the turbo elbow. Even if you made the connection the filter would not be in a good location.

2. Taking off the stock air intake assembly is a pain in the ***. There are three mounting bolts. The first is easy, the second and third are rubber grommets with no logical removal method- short of breaking the assembly.

3. The intake on the 6637 is short and tapered. Not sure that a clamp would hold.

Short of a visit to the local furnace dealer for some oddball flex hose and figuring out a way to secure the filter once connected, I think the original is the better option.

Maybe I missed something- but not as easy as advertised.