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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Stock Air Filter vs Helene Streamline SE



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      07-09-2009, 10:17 AM   #1
hifidawg09
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Stock Air Filter vs Helene Streamline SE

I have noticed that after dropping in the Helene filter
I am no longer hearing the high pitched wine from the engine.
I thought this was the noise the turbos were making as they spool up, but after the filter upgrade realized that it must be some resonance in the air box.
I wonder if it means that the Helene filter has better air flow? I sort of
miss the stock sounds my engine made and maybe selling the Helene
Anyone have similar experiences? Any takers for on the Helene Streamline SE?

Last edited by hifidawg09; 07-09-2009 at 10:33 AM.
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      07-09-2009, 11:23 AM   #2
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Are you after sound or after power ? Helene is supposed to make your engine make a few hp more. By the way, do you feel a change in power ?
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      07-09-2009, 12:22 PM   #3
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No noticeable change in power, but I have not been driving aggressively with it all that much yet.
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      07-09-2009, 12:26 PM   #4
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If its already in there might as well leave it there. I never noticed any change in sound and Im sure your not missing much. Its a better filter than the oem one IMO. I have one and Im happy with it. It worked better than both my riss intake and vishnu dci.
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      07-09-2009, 12:27 PM   #5
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Ship it over here. I'll give you $50 for the used filter.
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      07-09-2009, 12:39 PM   #6
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Quote:
Originally Posted by fotios335i View Post
If its already in there might as well leave it there. I never noticed any change in sound and Im sure your not missing much. Its a better filter than the oem one IMO. I have one and Im happy with it. It worked better than both my riss intake and vishnu dci.
I am going to drive around with it for a while. The filter needs to be oiled once in a while? Do you know what the interval for this?
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      07-09-2009, 01:32 PM   #7
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Damn those Helene people telling me I had to buy their own cleaning and oil kit...come to find out I could have used my (barely used) K&N cleaning and oil kit on it.

If people tell you they can notice any hp gain with a filter, you should respond with a bridge for sale.
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      07-09-2009, 01:37 PM   #8
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Damn those Helene people telling me I had to buy their own cleaning and oil kit...come to find out I could have used my (barely used) K&N cleaning and oil kit on it.

If people tell you they can notice any hp gain with a filter, you should respond with a bridge for sale.
How often did you oil it?
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      07-09-2009, 02:14 PM   #9
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Have not had to clean yet, but I believe the general practice is around 10-15k miles - which is appx the same interval for replacing a stock AF. I can't wait to go through the joy of muscling the filter box top back on....
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      07-09-2009, 02:36 PM   #10
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I have had the Helene for about 9000 miles and its not too dirty. The only real noticeable difference for me was a little better gas mileage and better throttle response. Nothing huge but slightly noticeable.
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      07-13-2009, 05:51 AM   #11
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Hi,

Where did you buy Helene filters online ? I need to order one now and I can only find one store shipping to Romania (at the ridiculous shipping price of $145).
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