parts comparison

i have an 05 mazda 6. and when i was looking for an intake i found that i know someone that can get intake directly through mazdaspeed becuase he works with a dealership. but i dont know if they compare to intakes say from aem or injen. does anybody have some resoning why mazdaspeed intakes will be better or worse then the other brands.  

so nobody has a reply huh  

what brand of intake is the dealership selling?  
____________________________________________________________________________________________________You couldn't fool your mother on the foolingest day of your life with an electrified fooling machine.

I assume it's Mazdaspeed (their version of TRD, right?) No idea what their products are like, though.  
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1994 GTO Twin Turbo
nothin wrong with front-wheel drive, I just refuse to own one

Mazdaspeed is pretty much like Nissan's Nismo & Toyota's TRD. For the most part you won't get a whole lot of power from it, but its better than nothing. Other brands like AEM or Injen may net you 1 or 2 hp more on top of the maybe 5 or 6 hp you'll get from the Mazdaspeed.  
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http://rides.importtuner.com/ride/1076723/jimichanga/2005/honda/s2000/index.html

so pretty much the other after market brands are better quality. i had thought that but wasnt to sure becuase i dont know to many people with tuned up mazda's. and mazda speed can only be dealt with through the dealerships.  

The quality of the part isn't the question. The quality should be comparable to other aftermarket brands and may even be better sometimes. The problem lines in the design of the part itself. For some reason, very few manufacturer's tuning companies make decent, or even the same, power over a comparable aftermarket part.

Extra info but I though I'd throw it in. The good thing about Mazdaspeed/Nismo/TRD/or whatever company, is that they are usually, and should be, fully covered by warranty with no questions asked, whereas another aftermarket brand may raise some eyebrows, but they can't deny warranty if the part doesn't directly affect the problem.  
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http://rides.importtuner.com/ride/1076723/jimichanga/2005/honda/s2000/index.html

that makes sense becuase my friend has a subaru sti and he is getting real low compression rate. the're trying to screw him becuase they say he has after market parts that contriputed to the problem.