I just had the MAFS replaced after using K&N ail filters for about 10,000 miles - The Unofficial BMW M5 Messageboard (m5board.com)

tranck · 23rd June 2005, 03:40

Tech said that they were badly contaminated with oil residue.

They ain't worth it boys.

jlindy · 23rd June 2005, 04:19

That's what I have been saying for years, but there is a whole group of people who swear by them. They do breathe well, but they let way too much oil in. Sorry to hear that, but glad you got it fixed.

drallen · 23rd June 2005, 04:36

I know that it sounds bad...but, I would rather clean the MAFs than lose the 10 to 15 RWHP

Mark

DavidS · 23rd June 2005, 11:15

For those with a K&N induced MAF replacement habit, there is a lower cost source of original MAF sensing elements:

57,000 miles, and the MAFS went out.. alternative to replacement!

David

Nolift911 · 24th June 2005, 00:52

Quote:

Originally Posted by drallen

I know that it sounds bad...but, I would rather clean the MAFs than lose the 10 to 15 RWHP

Mark

10-15 RWHP ?? On what planet? And is it 10 or 15? You do realize what a gain of 10 or 15 RWHP equates to?

Slowly drop the crack pipe and back away...

-Jeff

jhowton · 24th June 2005, 01:01

Quote:

Originally Posted by Nolift911

You do realize what a gain of 10 or 15 RWHP equates to?

Well it's certainly nothing noticeable on a 400HP car.

tranck · 24th June 2005, 01:06

Quote:

Originally Posted by drallen

I know that it sounds bad...but, I would rather clean the MAFs than lose the 10 to 15 RWHP

Mark

OK so you gain 10 HP (which is a real stretch, btw) - that will be for about 500 miles before the MAFS get contaminated then you will LOSE horsepower.

So, what is the point?

I've seen 1st hand what they have done and my only reason for this thread is to warn other members.

Not only are they NOT worth it but, you'll lose HP as a result longterm.

Chuckc · 24th June 2005, 01:15

I tried the K&N filters and the stock filters with the AA CAI. I could never FEEL a difference in performance when comparing the two, so I left the stock filters in.

Boz M5 · 24th June 2005, 02:57

Quote:

Originally Posted by tranck

OK so you gain 10 HP (which is a real stretch, btw) - that will be for about 500 miles before the MAFS get contaminated then you will LOSE horsepower.

So, what is the point?

I've seen 1st hand what they have done and my only reason for this thread is to warn other members.

Not only are they NOT worth it but, you'll lose HP as a result longterm.

Ive had the K&Ns on my car for over 2 years and have never had a problem. I just serviced/cleaned them last month. With no problems. You must be putting to much oil on them.
Boz

mottati · 24th June 2005, 03:07

Quote:

Originally Posted by Nolift911

10-15 RWHP ?? On what planet? And is it 10 or 15? You do realize what a gain of 10 or 15 RWHP equates to?

Slowly drop the crack pipe and back away...

-Jeff

IIRC Mark actually did a filter swap on the dyon stand and saw a dramatic increase in whp when he took out fairly new paper filters.

There have been many to use k&n's without problems, many who had problems. I've had my dinan intakes, which use oiled filters (look like k&n's but have a big D on them

) for almost 2 years without issues as well. Must be the special dinan oil filter oil that is mafs friendly.

Mike