is an air filter a good idea?

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03-23-2008, 07:44 AM

545ibimmer

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My Ride: 05" 545i 6 speed

im trying to add a little boost to my 545i, but nothing major, wondering if i can add the air filter? will its eat more gas or whats the downside?

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03-23-2008, 07:51 AM

swajames

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My Ride: 2008 Porsche 911 Carrera S Convertible. Midnight Blue, 6 Speed.Retired - 2007 997 Carrera S, Midnight Blue, Grey leather, premium audioRetired - 2007 550i, Monaco Blue over Beige, Navigation, Logic 7, Cold Weather Pack, Comfort Access, Sport Package

Model Year: 2008

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Originally Posted by 545ibimmer' post='549474' date='Mar 23 2008, 08:44 AM

im trying to add a little boost to my 545i, but nothing major, wondering if i can add the air filter? will its eat more gas or whats the downside?

Assuming you have a US model there is an additional charcoal filter in your airbox that can be removed to improve airflow a little. I did it on my 2005 545 and there did seem to be some improvement (mainly throttle response). There were a number of threads on the forum a year or two ago that discussed the removal. This additional filter wasn't on EU models, it was apparently on US cars for emissions purposes. The charcoal filter was also present on my 2007 550 (but designed differently and more difficult to remove) but on the 2005 it was a very easy process. Not sure if the LCI models have the filter.

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03-25-2008, 07:24 AM

EHowe12

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My Ride: 2006 550 Titanium Silver: Came with: Steptronic , Active Steering , Logic 7, Comfort Package, Cold Weather Package, Sport Package, PDC , F&B Heated Seats , M-Technic body kit Added/Changed: 19" M5 wheels, AFe CAI, H&R Performance Springs, EuroBahn Performance Software, Eisenmann Racing Exhaust

Quote:

Originally Posted by 545ibimmer' post='549474' date='Mar 23 2008, 11:44 AM

im trying to add a little boost to my 545i, but nothing major, wondering if i can add the air filter? will its eat more gas or whats the downside?

I had the AFe Cold Air Intake installed on my car (2006 550i) last year. There is a slight increase in engine noise but aside from that there is no down side. The fit is beautiful and coupled with the performance software the difference in power is noticeable.