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6 Series
The BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 06-03-2009, 11:07 PM
WU99WU WU99WU is offline
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Air Filter K&N 33-2294 ANYONE USE THIS?

lookin at diff intake/ filter options for the 2005 645ci. anyone have any experiance with this item? They are only like $60.00 shipped all over the web.... is it worth it? any horsepower gain that you can notice? does it sound better/ more aggresive?

http://www.knfilters.com/search/prod...x?Prod=33-2294

if this is not recommended, what is?....
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  #2  
Old 06-04-2009, 04:02 AM
NenitoZ NenitoZ is offline
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You wont notice a difference in power or sound, but they are good filters. I just got a cone type one and slapped it on.
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  #3  
Old 06-04-2009, 10:39 AM
WU99WU WU99WU is offline
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did some more research...

looks like BMC makes a filter also 421/01. anyone know if the BMC is any better than the K&N? The BMC filter for the stock airbox is around $100.00 vs. K&N $60-70.00.... Also looks like the way to go is to also buy 1 RPI air scoop thing, around $100.00. I'm not sure but can you even buy just one? I would assume so, but I could be wrong.

do you guys recommend K&N filter & RPI air scoop OR BMC filter & RPI air scoop?

both combos cost less than $200.00.

FYI: I noticed DINAN is selling a K&N filter in "blue" color and is taxin an extra $10.00 or so....

pic of BMC filter & RPI scoop below
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  #4  
Old 06-04-2009, 10:51 AM
NWS Alpine NWS Alpine is offline
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The filters are all about the same. You can buy just 1 RPI scoop. Since the regular 6 only has the intake on one side unless you have the Dinan airbox.
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Mods: OEM style 249 19" rims, H&R 10mm front spacers and 12mm rear spacers, KW v3 coilovers, Magnaflow exhaust (x-pipe, mufflers, resonator delete), RPi scoop, BMC filter (charcoal delete), LED angel eyes, 30% tint, OEM iPod interface, AC Schnitzer aluminum pedals, black kidney grill
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  #5  
Old 06-04-2009, 12:25 PM
knass34 knass34 is offline
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Quote:
Originally Posted by WU99WU View Post
lookin at diff intake/ filter options for the 2005 645ci. anyone have any experiance with this item? They are only like $60.00 shipped all over the web.... is it worth it? any horsepower gain that you can notice? does it sound better/ more aggresive?

http://www.knfilters.com/search/prod...x?Prod=33-2294

if this is not recommended, what is?....
I in fact just installed mine two days ago! I also took out my charcoal filter and noticed a difference in sound. Not much but enough that I think the stock exhaust sounds deeper. Even my buddy asked me this morning if I had done something different!
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  #6  
Old 06-04-2009, 06:52 PM
mdhyde mdhyde is offline
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Did you ever stop to think the charcoal filter is there for a reason? Unless you are replacing it with a Dinan Dual (which requires the removal), you probably are better off leaving it on. Those motors are sensitive and expensive to fix. Is having a better sound worth potentially damaging your motor?

I had my main resonator replaced with an xpipe and replaced stock mufflers with magnaflows. For $400, it sounds like a ferrarri now. Smog legal too. So put back your filter and pony up some bucks for some real sounds. It isnt hard, any muffler shop can handle it.
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  #7  
Old 06-04-2009, 06:54 PM
Phatisfy Phatisfy is offline
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Quote:
Originally Posted by mdhyde View Post
Did you ever stop to think the charcoal filter is there for a reason? Unless you are replacing it with a Dinan Dual (which requires the removal), you probably are better off leaving it on. Those motors are sensitive and expensive to fix. Is having a better sound worth potentially damaging your motor?

I had my main resonator replaced with an xpipe and replaced stock mufflers with magnaflows. For $400, it sounds like a ferrarri now. Smog legal too. So put back your filter and pony up some bucks for some real sounds. It isnt hard, any muffler shop can handle it.
Please post some sound clips! I would love to hear your set up.
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  #8  
Old 06-04-2009, 07:03 PM
NWS Alpine NWS Alpine is offline
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Quote:
Originally Posted by mdhyde View Post
Did you ever stop to think the charcoal filter is there for a reason? Unless you are replacing it with a Dinan Dual (which requires the removal), you probably are better off leaving it on. Those motors are sensitive and expensive to fix. Is having a better sound worth potentially damaging your motor?
The charcoal filter is only on US spec cars. The reason it was implemented to to pass emissions tests in California for when a car is turned off. It's suppose to filter any harmful backflow emissions that might flow out of your intake.
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Mods: OEM style 249 19" rims, H&R 10mm front spacers and 12mm rear spacers, KW v3 coilovers, Magnaflow exhaust (x-pipe, mufflers, resonator delete), RPi scoop, BMC filter (charcoal delete), LED angel eyes, 30% tint, OEM iPod interface, AC Schnitzer aluminum pedals, black kidney grill
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  #9  
Old 06-04-2009, 07:06 PM
Phatisfy Phatisfy is offline
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+1^^^^^
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  #10  
Old 06-04-2009, 07:11 PM
knass34 knass34 is offline
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Quote:
Originally Posted by mdhyde View Post
Did you ever stop to think the charcoal filter is there for a reason? Unless you are replacing it with a Dinan Dual (which requires the removal), you probably are better off leaving it on. Those motors are sensitive and expensive to fix. Is having a better sound worth potentially damaging your motor?

I had my main resonator replaced with an xpipe and replaced stock mufflers with magnaflows. For $400, it sounds like a ferrarri now. Smog legal too. So put back your filter and pony up some bucks for some real sounds. It isnt hard, any muffler shop can handle it.
Wow! I would love to hear your setup too! Sorry for my ignorance, but could you please explain exactly what you did so I could possibly tell my mechanic to do accordingly.
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  #11  
Old 06-04-2009, 11:59 PM
feriors feriors is offline
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Quote:
Originally Posted by mdhyde View Post
Did you ever stop to think the charcoal filter is there for a reason? Unless you are replacing it with a Dinan Dual (which requires the removal), you probably are better off leaving it on. Those motors are sensitive and expensive to fix. Is having a better sound worth potentially damaging your motor?

I had my main resonator replaced with an xpipe and replaced stock mufflers with magnaflows. For $400, it sounds like a ferrarri now. Smog legal too. So put back your filter and pony up some bucks for some real sounds. It isnt hard, any muffler shop can handle it.
Like everyone said, charcoal filter is just for emissions. Euro spec cars don't have it. Sorry to say but adding magnaflow mufflers isnt going to make your car sound like a ferrari. Closest bmw i heard that sounds similiar to a ferrari would be a m5/m6 with tubi exhaust but even then its not close.
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  #12  
Old 06-05-2009, 01:38 AM
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ky2970 ky2970 is offline
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Quote:
Originally Posted by mdhyde View Post
Did you ever stop to think the charcoal filter is there for a reason? Unless you are replacing it with a Dinan Dual (which requires the removal), you probably are better off leaving it on. Those motors are sensitive and expensive to fix. Is having a better sound worth potentially damaging your motor?

I had my main resonator replaced with an xpipe and replaced stock mufflers with magnaflows. For $400, it sounds like a ferrarri now. Smog legal too. So put back your filter and pony up some bucks for some real sounds. It isnt hard, any muffler shop can handle it.
We need a vid... now... or else...
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  #13  
Old 06-05-2009, 03:32 PM
WU99WU WU99WU is offline
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well i ended up ordering the rpi air scoop & BMC intake filter from RPI $195.00 shipped! should get it by Tuesday, will post some pics after the instal!
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  #14  
Old 06-13-2009, 05:21 AM
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Giantsfan82 Giantsfan82 is offline
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Quote:
Originally Posted by mdhyde View Post
Did you ever stop to think the charcoal filter is there for a reason? Unless you are replacing it with a Dinan Dual (which requires the removal), you probably are better off leaving it on. Those motors are sensitive and expensive to fix. Is having a better sound worth potentially damaging your motor?

I had my main resonator replaced with an xpipe and replaced stock mufflers with magnaflows. For $400, it sounds like a ferrarri now. Smog legal too. So put back your filter and pony up some bucks for some real sounds. It isnt hard, any muffler shop can handle it.
Prove it
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  #15  
Old 06-14-2009, 10:57 AM
hipertec hipertec is online now
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Does the K & N oil clog the mass flow sensor? There has been alot of debate on the cone style with oil.
I wonder how the factory styles filters creates issues on the MFS
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  #16  
Old 09-22-2009, 10:41 AM
-Paul- -Paul- is offline
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Thinking of fitting one of these too. Can someone explain the ram air scoop to me please? From what I can make out, my car intakes air from behind the slats via flaps that are currently closed - I guess they open during driving.

What do the air scoops do exactly? Do they bypass the flaps behind the slats?

WU99WU - Did you fit? - Your thoughts?
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  #17  
Old 09-22-2009, 10:49 AM
NWS Alpine NWS Alpine is offline
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Quote:
Originally Posted by -Paul- View Post
Thinking of fitting one of these too. Can someone explain the ram air scoop to me please? From what I can make out, my car intakes air from behind the slats via flaps that are currently closed - I guess they open during driving.

What do the air scoops do exactly? Do they bypass the flaps behind the slats?

WU99WU - Did you fit? - Your thoughts?
There are no flaps behind the grill. The intake tunnel for the air is on the side behind the grill. The RPI scoop forces tons more air directly into the tunnel on the side. Really helps increase airflow into the box.
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2006 650i - SMG - Alpine White / Chateau
Mods: OEM style 249 19" rims, H&R 10mm front spacers and 12mm rear spacers, KW v3 coilovers, Magnaflow exhaust (x-pipe, mufflers, resonator delete), RPi scoop, BMC filter (charcoal delete), LED angel eyes, 30% tint, OEM iPod interface, AC Schnitzer aluminum pedals, black kidney grill
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  #18  
Old 09-22-2009, 11:16 AM
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PEnglish11 PEnglish11 is offline
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RPI scoops/plates & MTec V2

Quote:
Originally Posted by NWS Alpine View Post
There are no flaps behind the grill. The intake tunnel for the air is on the side behind the grill. The RPI scoop forces tons more air directly into the tunnel on the side. Really helps increase airflow into the box.
I have the Dinan High Flow Air Induction System. I am installing the twin RPI scoops next Monday along with with the block off plates. I will be interested to feel the difference if any. I am also installing MTec V2 angel eye kit from E-92 Lighting and will post pics as promised.
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  #19  
Old 09-22-2009, 11:23 AM
NWS Alpine NWS Alpine is offline
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Originally Posted by PEnglish11 View Post
I have the Dinan High Flow Air Induction System. I am installing the twin RPI scoops next Monday along with with the block off plates. I will be interested to feel the difference if any. I am also installing MTec V2 angel eye kit from E-92 Lighting and will post pics as promised.
The twin scoops with the Dinan box should really help at speed. I would imagine it might take a few miles to adjust to the new flow.

Also I'm not sure if the regular 6 needs the block off plates. I believe it is only the M6 that has the brake ducts connected to the air intake duct but I could be wrong.
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2006 650i - SMG - Alpine White / Chateau
Mods: OEM style 249 19" rims, H&R 10mm front spacers and 12mm rear spacers, KW v3 coilovers, Magnaflow exhaust (x-pipe, mufflers, resonator delete), RPi scoop, BMC filter (charcoal delete), LED angel eyes, 30% tint, OEM iPod interface, AC Schnitzer aluminum pedals, black kidney grill
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  #20  
Old 09-22-2009, 11:29 AM
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Solidjake Solidjake is offline
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No filter beats the OEM one. The aftermarket ones tend to send the MAF's to the grave.
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  #21  
Old 09-22-2009, 11:32 AM
feriors feriors is offline
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The ram air scoops is exactly what it sounds like. It rams air into your engine via scoop. You won't notice the different at low speeds. I believe the gains you will feel is on the highway when you are going 80+. Your car will pull harder as opposed to stock.
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  #22  
Old 09-22-2009, 11:40 AM
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PEnglish11 PEnglish11 is offline
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Quote:
Originally Posted by NWS Alpine View Post
The twin scoops with the Dinan box should really help at speed. I would imagine it might take a few miles to adjust to the new flow.

Also I'm not sure if the regular 6 needs the block off plates. I believe it is only the M6 that has the brake ducts connected to the air intake duct but I could be wrong.
We shall see, thanks for the input.
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20" Miro M6 rims; Red MGP caliper covers; Britalman cat-back exhaust; DINAN High Flow Air intake, throttle body & stage 3 software; RPi scoops; MTec V2 angel eyes; LED lighting; 70% window tint; //M Steering wheel; OEM iPod interface; //M footrest & pedal pads; //M3 Shifter
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  #23  
Old 09-23-2009, 12:34 AM
-Paul- -Paul- is offline
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Quote:
Originally Posted by NWS Alpine View Post
There are no flaps behind the grill. The intake tunnel for the air is on the side behind the grill. The RPI scoop forces tons more air directly into the tunnel on the side. Really helps increase airflow into the box.
There are flaps behind the grill. Irfan knows what I'm on about.

http://www.bimmerfest.com/forums/sho...8&postcount=30
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  #24  
Old 09-23-2009, 07:32 AM
NWS Alpine NWS Alpine is offline
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Originally Posted by -Paul- View Post
There are flaps behind the grill. Irfan knows what I'm on about.

http://www.bimmerfest.com/forums/sho...8&postcount=30

You are both from the UK. These flaps must not be present on the US spec cars.
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2006 650i - SMG - Alpine White / Chateau
Mods: OEM style 249 19" rims, H&R 10mm front spacers and 12mm rear spacers, KW v3 coilovers, Magnaflow exhaust (x-pipe, mufflers, resonator delete), RPi scoop, BMC filter (charcoal delete), LED angel eyes, 30% tint, OEM iPod interface, AC Schnitzer aluminum pedals, black kidney grill
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  #25  
Old 09-23-2009, 09:52 AM
-Paul- -Paul- is offline
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Yes - maybe thats it - if that's the case - I wonder what they are for?
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