OK, I know I'm new to this and p r e t t y s l o w.... but I just gotta know what I should do for a bigger air filter. I take it from reading some posts that a BHAF is an after-market, much bigger air filter. This allows more air into the turbo, thus increasing output and reducing fuel mileage. Am I on the right track?

So, if thats the case, what BHAF should I look at, and how much? Is the BHAF an interior filter (i.e. is it housed inside an air filter housing), or is it external of a hard air filter housing?

PS. New clutch just cost me $700. Thats the LUK Pro Gold Series clutch and a new flywheel.... A friend and I are installing it on Friday. Wish us luck!!!

 

There is only one "BHAF" filter. It's actually a big rig paper filter which has a lot more area than the stock filter. It allows the turbo to breathe better, but its affects aren't noticed until you start developing serious HP. It does however let the turbo whine out which is why I use one for my "sheep in wolf's clothing" ride. Check the FAQ section for filter numbers.

 

Here's some of the part numbers for the BHAF, I am in the process of ordering the Wix Filter and and Outerwear Pre-Filter anyways the part #'s....

John Deere PMAH19037 $55
Wix 42790 $29.41
NAPA 2790 $57.04
AFE 20-40044
Hastings af 1012
Carquest 87790 $64.78
Caterpillar 3i 0005
Fram ca 6818

Pre-Filter
Outerwear wr 3325-105
AFE 28-10033

 

So do you have to do any modifications to install one of these filters? Lets say I wanted to go with the NAPA filter. What would I have to do to fit it on?

 

Remove the stock air box and attach the hose to the end of the filter is about it. There's a pattern, I think also in the FAQ section, for a heat shield that you can make to shield it from the engine heat a bit. Not required, but might be helpful.

 

hooks right to the stock intake tube and it looks like this(sans the Outerwears)

 

it will not reduce your fuel mileage, but im betting $20 you already knew that and the above was a typing error

 

Actually, it does a little bit.
You can hear the turbo more, so you tend to have a heavy foot to produce more and more turbo noise.

After a couple months, it wears off, and mileage returns to normal.


phox

 

Where can i find one of those outerwears, thanks in advance-Justin

 

I believe the link is Outerwearsracing.com

 

Cool, thanks again.

 

where do you get those covers like that ib your BHAF, are they water proof?

 

Not water proof, but quite water resistant.

http://www.outerwearsracing.com/prod...22392E43D83493

If link doesn't work, click on "search by make and model", then put BHAF into the keyword box.


phox

 

The link is already posted above.

 

The filters themselves are/should be waterproof. I had a 2818 Baldwin on my PSD and it was waterproof. The filtering media is more advanced in the better filters over a paper filter. The higher cost is evened out by a longer service life.

Big Jimmy