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  #1  
Old 02-17-2016, 06:11 PM
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Cone air filter options listing

So I've reviewed a bunch of threads on Xoutpost about replacing the Dinan's CAI filter and the list of air filters that can be used is kinda everywhere... so I'm putting together this list for convenience.
I have NOT tried any of these, but from quick measurements taken (I will be double checking soon) it seems these (and maybe more) model are available to use as options for the Dinan CAI system (I can not speak to any other CAI as clearance may be different than the Dinan air box/metal shroud)

EDIT: so I measured and took pics (will load later) of all measurements of Dinan d403-0410 air filter and of Dinan air box installed and clearances inside.
D403-0410 measures:
Flange (rubber boot) ID: 101.6mm (4")
Base of filter medium: 138.4mm (5.45")
Top of filter medium: 112.3mm (4.42")
Length of filter medium: 163mm (6.42")
Length of air filter: 182mm (7.16")

Dinan: d403-0410 (needs to be oiled)
Replacement Air Filter for Dinan Cold Air Intake - Dinan, Leader in BMW Performance Parts and Upgrades

K&N: RU-2590 (needs to be oiled)
RU-2590 - K&N Universal Air Filters, Universal Rubber Filter direct from K&N

AFE: 21-91073 (does NOT need to be oiled) (has 3 layers of filter media)
Air Filters Intake Filter Magnum FLOW IAF PRO DRY S Air Filters; 4"F x 6"B(INV) x 4-1/2"T (INV) x 6-1/2"H 21-91073 - aFe Power

AFE: 24-91073 (needs to be oiled)
Air Filters Intake Filter Magnum FLOW IAF PRO¬*5R Air Filters; 4"F x 6"B(INV) x 4-1/2"T (INV) x 6-1/2"H 24-91073 - aFe Power

AFE: 21-91057 (does NOT need to be oiled) (has 2 layers of filter media) (7" long)
Air Filters Intake Filter aFe Power MagnumFLOW IAF PRO DRY S Air Filters; 4 F x 6 B x 4-1/2 T (INV) x 7 H 21-91057 - aFe Power

AFE: 24-91057 (needs to be oiled) (7" long)
Air Filters Intake Filter aFe Power MagnumFLOW AF¬*Pro 5R; 4 F x 6 B x 4-1/2 T (INV) x 7 H 24-91057 - aFe Power

AEM: 21-2057BF/DK models (does NOT need to be oiled)
AEM 21-2057DK - Universal Air Filters, AEM DryFlow Air Filter Factory Direct or
AEM 21-2057BF - Universal Air Filters, AEM DryFlow Air Filter Factory Direct (off road use supposidly)

Volant: Power Core 61509 (IS NOT oiled, but is NOT washable either) - I installed this BEAST of a filter and it DOES have to be installed at an angle to get it to fit inside the Dinan CAI metal shroud. 99.9% air cleaned. Biggest rating out there.
http://www.volant.com

I read on another Bimmer forum that the K&N is an exact replica in regards to sizing of the Dinan's d403-0410 filter. EDIT: they did use the same dimensions. See above.
I confirmed measurements. Since this is true, then the other filters I've listed are ALSO very close measurement options. with the AEM brand being the widest filter base and top, then the AFE brand then K&N/Dinan filters being narrowest (5.375" @ base, 4.375" at top). the AFE ones I've listed have more filter membrane as they have an inverted top instead of rubber sealed flat top, and therefore more air cleaning/intake.


just a comment on the Dinan CAI metal box/shroud VS the metal AFE stage 1 shroud...
the AFE takes advantage of the factory air cowl and allows air from this to be cowl directed towards the air filter (see red circle in pic). The Dinan air box does NOT allow airflow from the factory air cowl to enter the metal box. I'm sure you can find a way though to get the air into it somehow...but would require modification of the Dinan box.
Attached Images
          
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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'05 X5 4.4i

Last edited by Clockwork; 05-24-2018 at 03:19 PM.
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  #2  
Old 02-17-2016, 06:40 PM
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Quote:
Originally Posted by Clockwork View Post
So I've reviewed a bunch of threads on Xoutpost about replacing the Dinan's CAI filter and the list of air filters that can be used is kinda everywhere... so I'm putting together this list for convenience.
I have NOT tried any of these, but from quick measurements taken (I will be double checking soon) it seems these (and maybe more) model are available to use as options for the Dinan CAI system (I can not speak to any other CAI as clearance may be different than the Dinan air box/metal shroud)

Dinan: d403-0410 (needs to be oiled)
Replacement Air Filter for Dinan Cold Air Intake - Dinan, Leader in BMW Performance Parts and Upgrades

K&N: RU-2590 (needs to be oiled)
RU-2590 - K&N Universal Air Filters, Universal Rubber Filter direct from K&N

AFE: 21-91073 (does NOT need to be oiled) (has 3 layers of filter media)
Air Filters Intake Filter Magnum FLOW IAF PRO DRY S Air Filters; 4"F x 6"B(INV) x 4-1/2"T (INV) x 6-1/2"H 21-91073 - aFe Power

AFE: 24-91073 (needs to be oiled)
Air Filters Intake Filter Magnum FLOW IAF PRO¬*5R Air Filters; 4"F x 6"B(INV) x 4-1/2"T (INV) x 6-1/2"H 24-91073 - aFe Power

AFE: 21-91057 (does NOT need to be oiled) (has 2 layers of filter media) (7" long)
Air Filters Intake Filter aFe Power MagnumFLOW IAF PRO DRY S Air Filters; 4 F x 6 B x 4-1/2 T (INV) x 7 H 21-91057 - aFe Power

AFE: 24-91057 (needs to be oiled) (7" long)
Air Filters Intake Filter aFe Power MagnumFLOW AF¬*Pro 5R; 4 F x 6 B x 4-1/2 T (INV) x 7 H 24-91057 - aFe Power

AEM: 21-2057BF/DK models (does NOT need to be oiled)
AEM 21-2057DK - Universal Air Filters, AEM DryFlow Air Filter Factory Direct or
AEM 21-2057BF - Universal Air Filters, AEM DryFlow Air Filter Factory Direct (off road use supposidly)

Volant: Power Core 61509 (does NOT need to be oiled)
Volant Cool Air Intakes


I read on another Bimmer forum that the K&N is an exact replica in regards to sizing of the Dinan's d403-0410 filter.
I hope to confirm measurements tonight. If this is true, then the other filters I've listed are ALSO very close measurement options. with the AEM brand being the widest filter base and top, then the AFE brand then K&N/Dinan filters being narrowest (5.375" @ base, 4.375" at top). the AFE ones I've listed have more filter membrane as they have an inverted top instead of rubber sealed flat top, and therefore more air cleaning/intake.


just a comment on the Dinan CAI metal box/shroud VS the metal AFE stage 1 shroud...
the AFE takes advantage of the factory air cowl and allows air from this to be cowl directed towards the air filter (see red circle in pic). The Dinan air box does NOT allow airflow from the factory air cowl to enter the metal box. I'm sure you can find a way though to get the air into it somehow...but would require modification of the Dinan box.

Great info. I personally would stay away from the oiled media air filters. The pro S type filters work really well.Afe knows what they are doing.
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  #3  
Old 02-17-2016, 06:49 PM
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Quote:
Originally Posted by X53Jay4.8is View Post
Great info. I personally would stay away from the oiled media air filters. The pro S type filters work really well.Afe knows what they are doing.
I agree. I just figured I'd post them to make the list a bit more comprehensive for people who may want to run the oiled filters.
__________________
I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

_______________________
'91 850i
'05 X5 4.4i
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  #4  
Old 02-17-2016, 06:52 PM
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Quote:
Originally Posted by Clockwork View Post
I agree. I just figured I'd post them to make the list a bit more comprehensive for people who may want to run the oiled filters.

Good deal
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  #5  
Old 02-19-2016, 06:42 PM
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Holy crap, this 6" column style airfilter by Donaldson (Volant partnered with them) is huge.

After driving with this Donaldson PowerCore air filter at multiple different speeds for a bit have to say that it mutes the sound of the CAI from a more beastly sound that it made with the Dinan/other brand cone style air filter but it is still slightly more beefy than just the factory air filter/air box.
__________________
I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

_______________________
'91 850i
'05 X5 4.4i

Last edited by Clockwork; 02-21-2016 at 12:11 AM.
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  #6  
Old 05-17-2016, 04:00 PM
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So I have a question I'm hoping ppl can help with...
I have the Dinan CAI installed and it reallllly limits the amount of air that can enter the air filter since the factory air cowl is no longer useful (but does a great job at cooling down engine bay).

I've been thinking of putting slits OR a trunk air breather vent style system into the black plastic wheel well/internal fender near the air filter so it can breathe better yet water (*which is no problem for a Volant brand air filter) would not interfere with the filters operation.

anyone have thoughts?
Or suggestions?
Attached Images
  
__________________
I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

_______________________
'91 850i
'05 X5 4.4i

Last edited by Clockwork; 05-18-2016 at 01:18 PM.
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  #7  
Old 05-18-2016, 08:25 PM
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air vents cut in wheel well plastic

So, instead of buying air vents and cutting BIG holes out of the inner fender to fit these flat air vents in a 3D plastic fender well I decided to cut my own air vent slots and bend the plastic back with the help of a heat gun. My work is reversible and I'd only need to add a dab of silicone as a sealant to weatherproof it back to factory.
lets see how it helps for air flow... I cant see it being a negative effect.
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__________________
I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

_______________________
'91 850i
'05 X5 4.4i
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  #8  
Old 05-19-2016, 07:52 AM
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I would think adapting the factory air scoop to the Dinan system would be better because you get the benefit of forced air feeding at speed, and the air inlet is about as high as you can get, further from kicked up dust than in the wheel well.
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Old 05-19-2016, 12:00 PM
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I would have preferred to do something with the factory air cowl and plastic pipe to help feed air into CAI box but that would require cutting the metal box a fair bit and I'm not sure I wanna go that far since its so expensive. If I could get a hose built that could attach to factory air cowl and then attach to the existing circular hole on side of metal box then I would have but I don't know any places that can build that here. It would be the best solution by far to use the factory air cowl and hose to metal box for feeding cooler air!!

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__________________
I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

_______________________
'91 850i
'05 X5 4.4i
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  #10  
Old 05-19-2016, 01:59 PM
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I've considered options that might increase the airflow into the Dinan CAI for years. I've never done any modification. The reasons being that too often logic when dealing with airflow does not apply, much improvement with airflow in benefit needs to be combined with improvements to the rest of the air in/out and fuel in components and unless it is forced air such as with a turbo, supercharger or nitrous there is insignificant gain in torque at any RPM and very little HP improvement even at high speeds.

I know that Dinan spends a lot of time and money on R&D. My guess if connecting to the factory air inlet was beneficial they would have done so. One of the reasons Dinan may not have done so is that they found there is more air getting in from the full frontal approach than limiting it to the air inlet.

I have stayed with the Dinan oiled filter and clean it more often than necessary. The downside is that I have to be very careful in the re-oilng process as too much oil will cause the MAF to fail. The filter that came with the system did that--Dinan paid for the new MAF.

On the other hand, who knows, you may achieve noticeable gains and it certainly looks like you are having fun. If it works I think you might want to consider something to cover it except when you really need the additional air, especially when it rains or snows. If the filter gets soaked a Prius will leave you in the dust.
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