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      03-13-2012, 05:43 PM   #23
Biff Grissel
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Quote:
Originally Posted by itsme123 View Post
To feel the minor difference that the filter makes, you need to know where to look for it. The car needs to be driven in manual mode instead of letting the automtic transmission shift. Besides the obvious gain in WOT, the gain will show up in the snappiness in transition between throttle positions. Example: going from 10% throttle in cruising to 70% throttle, the car will feel snappier in response vs the old restrictive filter. You'll also need to do this when holding a gear at an RPM, say 4000k. The automatic transmission shifts too early during normal driving conditions to let the driver feel much of a difference after the minor gain in HP. The gain in HP in WOT is not too much either because of the % gain in HP is so small in relation to how much the car have already. a 3 HP gain on a 150 hp car is a lot in ration vs a 3 HP gain in a 555 HP beast . But extra HP is extra HP. I'll take it any way I can
that is correct.. and great post op, thanks for the info!
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      03-14-2012, 09:15 AM   #24
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It appears these are completely different from the intakes on the N63 50i...

The filters on the N63 appear to be embedded into the center of a molded panel inside the airboxes. Completely different system from the S63 on the "M". This could be contributing to the 150hp difference between the two engines as it appears to be significantly more restrictive...

I did a quick search online and haven't found any aftermarket filters or intake systems for the 50i. Looking at the realoem diagram, now I know why.

Time permitting, I may dive into the airboxes this weekend to get a better understanding of what the filters look like and how they are held in there...

Below is the filter element outlined in red.
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      09-13-2012, 09:07 AM   #25
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Quote:
Originally Posted by itsme123 View Post
Besides the ones directly behind the airfilters? No.
I just replaced my filters on a 2013 X5M and there were no charcoal filters...
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      09-14-2012, 10:47 AM   #26
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Very nice, i've been debating if i should do this as well lol Just didn't know how to get the covers off lol
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      09-19-2012, 04:54 AM   #27
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no charcoal in mine when i swapped them
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      09-19-2012, 01:27 PM   #28
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Filters ordered, will most likely handle this this weekend
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      09-20-2012, 12:01 PM   #29
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Nice write up. Getting my filters today.
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      06-20-2013, 10:41 PM   #30
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Thanks for the DIY write up. I got mine today as well.
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      06-26-2013, 08:21 AM   #31
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I also have the K&Ns in mine. Come to think of it, it might be time to pull them out and give them a little cleaning!
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      07-31-2013, 12:32 PM   #32
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extremely helpful, thanks...installing mine (2012 X5M) next weekend, and will post my findings on any material performance differences.
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      08-01-2013, 11:04 AM   #33
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Old thread but the OEM paper filter wasn't poorly designed to begin with. A good reason why one would switch over to K&N is the longevity of the filter and not for marginal performance gains.
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      12-24-2013, 05:00 AM   #34
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unreal how easy this was did it in ten minutes lol all thanks to you
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      11-05-2014, 11:48 PM   #35
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Just replaced my filters with the K&N ones. I have to say that throttle response is noticeably sharper though my oem filters had 40k miles and noticeable debris on them. Could be due to cleaner filters most likely. Don't think this is placebo though, induction noise has slightly increased also
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      12-16-2014, 03:47 AM   #36
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After hearing some good reviews about the k&n filter, I decided to order one and since I saw a good price at 4wheelonline. I'm not expecting a big improvement also; I just want a good replacement for the stock.
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      06-20-2015, 02:58 PM   #37
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To add, the screws are t20 torx

Easy job imo
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      05-10-2018, 02:28 PM   #38
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Thank you for the excellent write up! Doing my ride tonight... I also will be replacing my cabin air filter. I plan on taking pics like this and posting.

Cheers

Update... Easy install, like 5 minutes. Took longer to wipe down the inside of the intake than replacing the filters. I was shocked at how dirty the factory ones were, and the dealership just sold it to me in March. It was a re-certified model but can't see how the factory filters made it through the inspection?
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      05-16-2018, 10:12 AM   #39
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I am expecting mine to show up today, and then I will get back to the drag strip, and see if they make any difference there, got some baseline runs last week.
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      05-17-2018, 10:26 AM   #40
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Quote:
Originally Posted by Colodano View Post
I am expecting mine to show up today, and then I will get back to the drag strip, and see if they make any difference there, got some baseline runs last week.
Interested in any updates. I threw some in a couple of weeks ago purely because I can clean/re-use.
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      05-17-2018, 11:30 AM   #41
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Quote:
Originally Posted by El Wray View Post
Interested in any updates. I threw some in a couple of weeks ago purely because I can clean/re-use.
Well, it was a hotter day than last week, but I did run 2 10ths faster consistently. I did also remove my roof rack with cargo box, so I cannot say for sure it was the filters, but I am not complaining.

That and the fact that they are re-usable is always a plus!
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      05-27-2018, 04:18 PM   #42
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Thanks for the post. I used this to replace my filters, and it worked great. Nice to have the pics as a guide. $100 on Amazon.
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      06-26-2018, 07:21 AM   #43
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Thanks for the DIY. Just ordered BMC filters and will be using this guide to do this at home.
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