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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 06-12-2013, 02:14 PM   #1
snowste8
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advice on air intake

http://www.knfilters.com/search/prod...x?prod=57-1002

thinking of putting this in my 2004 325xi_a_
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Old 06-13-2013, 07:39 PM   #2
2002GreenBMW
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advice on air intake

Nice


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Old 06-13-2013, 08:02 PM   #3
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Cheaper HERE!
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Old 06-13-2013, 08:33 PM   #4
snowste8
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thank you! so you think it is worth the purchase?
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Old 06-13-2013, 09:25 PM   #5
Manny330
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advice on air intake

Go for it. Intakes are mostly for sound though and you will most likely lose performance from an open box system. I'm using the stock intake now but I had the ECIS system for 8 years and loved it. Just be careful if you re-oil the filter not to kill your MAF because its pricey.


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Old 06-13-2013, 10:28 PM   #6
E46iT
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i had GruppeM in my 02 touring and loved it... just purchased a Simota which is very similar to GruppeM. i currently have K&N filter in my stock intake.
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Old 06-14-2013, 12:37 AM   #7
GabeXI
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I went with AFE because they have a Pro Dry model that you don't have to re-oil every time you wanna clean the filter. I seriously doubt there are any power gains but people compliment me all the time on how my ride sounds.
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Old 06-14-2013, 10:22 AM   #8
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Save your money, don't bother with pointless mods like this. Spend money on tires and light wheels to improve performance. And maintenance of course.
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Old 06-14-2013, 10:27 AM   #9
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Re: advice on air intake

I have that intake and I like it but I only paid 70bucks for it from a friend. No gains but it sounds awesome at high revs. Around 4-5k. A little purr at low rpms. For my price it was worth it...for msrp.. I'd think twice about it.
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Old 06-14-2013, 07:18 PM   #10
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I agree... I have one on my Porsche too.... Probably not any power gains... But the sound (growl) is AWESOME!
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Old 06-14-2013, 07:24 PM   #11
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When I had my AFE intake throttle response worsened.
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Old 06-15-2013, 05:46 PM   #12
snowste8
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Thank you. I've decided not to get it. I'm just confused because you all say it decreases performance and I thought it's purpose was to increase performance?
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Old 06-15-2013, 05:49 PM   #13
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Re: advice on air intake

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Originally Posted by snowste8 View Post
Thank you. I've decided not to get it. I'm just confused because you all say it decreases performance and I thought it's purpose was to increase performance?
I never felt any performance decrease. I like the sound.
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Old 06-17-2013, 12:43 PM   #14
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Thank you. I've decided not to get it. I'm just confused because you all say it decreases performance and I thought it's purpose was to increase performance?
A more free flowing intake / air filter MAY increase top end hp and fuel efficiency if not cancelled out by other design flaws or taking warmer air from the engine compartment.

It's more of a style and sound thing, the K&N filter in the stock airbox seems like a good option to me, it flows a little better and you still get the ram air effect of the box.

I don't think it really matters anyway for HP, you might not gain muchy but you might not lose much either.. even if you lost a little it would be negligable for most driving.

Assume you're paying the $$ for the sound and coolness factor, if you can't justify it that way then I'd skip it

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Old 06-20-2013, 10:30 AM   #15
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These aren't economy first Honda engines with hidden potential. Everything has been maxed out right from the factory. The only mod that will give power (besides forced induction) are headers.
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Old 06-23-2013, 11:31 PM   #16
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Re: advice on air intake

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These aren't economy first Honda engines with hidden potential. Everything has been maxed out right from the factory. The only mod that will give power (besides forced induction) are headers.
That is incorrect. There are multiple mods that have dyno proven gains. The dinan long tube intake is the best intake on the market. Under drive pulleys, is another decent mod. If you have an auto trans the fan delete is another good one.

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Old 06-24-2013, 09:39 AM   #17
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^ I never understand these posts. The "dyno proven gains" that you mention for a Dinan long tube intake are in the neighborhood of 3-7hp at the wheels. If you can notice these differences in day to day driving, you would be a human dyno. FWIW, the long tube intakes are the only way to go if you absolutely must have an intake but IMO save your money for something that really makes a difference.

Underdrive pulleys are inherently a bad idea. The accessories on your car are designed to be run at a certain drive rate in order to produce a certain performance effect. Underdriving them negates this effect and can potentially cause many many more problems than the 2-3hp you gain from underdriving. You're almost better off just removing the accessory than underdriving it.

I hope that by fan delete you mean change from clutched fan to electric right? Deleting a fan is pretty dumb.
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Old 06-24-2013, 04:14 PM   #18
cardsfan007
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Re: advice on air intake

By fan delete I mean deleting the electric fan that is front of the radiator on autos and replacing the clutch fan with the electric that comes on manuals. And I have definitely felt a difference in the mods I have done

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Old 07-19-2013, 12:13 PM   #19
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I have that intake and I like it but I only paid 70bucks for it from a friend. No gains but it sounds awesome at high revs. Around 4-5k. A little purr at low rpms. For my price it was worth it...for msrp.. I'd think twice about it.
pics? also link me to the website
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