[HP Autosport]

AFE OE Replacement air filter for the BMW 328i F30 2012 L4-2.0L (t) N20. This filter is available in Pro 5R (P/N: 30-10225) and Pro DRY S (P/N: 31-10225). Constructed with 100% polyurethane, this high flow, OE replacement performance filter outflows the stock paper filter by 28% resulting in improved horsepower and torque.

[clarence]

Any dyno traces available?

[HP Autosport]

Originally Posted by clarence

Any dyno traces available?

No, not yet.

Just looking at the flow numbers you will pick up some power.

There will be a HPA version of the N20 high flow air fitler very soon as well!

[sleedawg]

What's the difference between the "Pro 5R" and "Pro Dry S?"

[HP Autosport]

Originally Posted by sleedawg

What's the difference between the "Pro 5R" and "Pro Dry S?"

Pro 5R is an oiled filter and supposed to flow better. Pro Dry S is a dry filter.

[SD_E88]

Forgive me, I've never used an oiled filter. Does it come oiled? Do I need to re-oil it? Clean it? What's the process for cleaning? or do I just replace it? How often? Again, never used an oiled filter so I'm really curious...

[HP Autosport]

Originally Posted by SD_F30

Forgive me, I've never used an oiled filter. Does it come oiled? Do I need to re-oil it? Clean it? What's the process for cleaning? or do I just replace it? How often? Again, never used an oiled filter so I'm really curious...

The oiled filter comes pre-oiled, just install it and go. When it is due for cleaning, you will need to clean it, allow it to dry, then apply oil before re-installation.


There is also a dry version that doesn't require any oil.

[dude987]

Really!!! I have some prime real estate for sale in Florida!

[bcl0328]

how much HP gain?

[Elk]

A few HP over a grubby stock filter.

Many oiled filters actually decrease performance from stock after they have been installed in the car for a while and have gathered some dirt. You are typically better off leaving it stock unless you are going to fastidiously clean and re-oil the filter on a very regular basis.

[darmawaa]

Also available for F30 335i ?

[HP Autosport]

Originally Posted by darmawaa

Also available for F30 335i ?

Yes, it is!

Pro-5R version is ready.


http://www.hpashop.com/aFe-F30-335i-...nel-Filter.htm

[ProbyOne]

Originally Posted by HP Autowerks

AFE OE Replacement air filter for the BMW 328i F30 2012 L4-2.0L (t) N20. This filter is available in Pro 5R (P/N: 30-10225) and Pro DRY S (P/N: 31-10225). Constructed with 100% polyurethane, this high flow, OE replacement performance filter outflows the stock paper filter by 28% resulting in improved horsepower and torque.

I see this "flow" figure thrown out a lot by filter manufacturers.

Does this mean a 28% increase in flowrate at the same pressure drop? What kind of pressure drop across the filter do you get at different air rates?

[HP Autosport]

Originally Posted by ProbyOne

I see this "flow" figure thrown out a lot by filter manufacturers.

Does this mean a 28% increase in flowrate at the same pressure drop? What kind of pressure drop across the filter do you get at different air rates?

That is a question for AFE. I don't know how they come up with their numbers.

We measure filters on flow benches and the results are a percentage, see this thread:

http://www.e90post.com/forums/showth...ght=flow+bench

[ProbyOne]

Originally Posted by HP Autowerks

That is a question for AFE. I don't know how they come up with their numbers.

We measure filters on flow benches and the results are a percentage, see this thread:

http://www.e90post.com/forums/showth...ght=flow+bench

Based on that thread the filter pressure drop was held constant and you measured the corresponding flowrates (given as a percentage).

That is exactly what I wanted to know... Thanks