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      03-21-2013, 01:48 PM   #15
tom @ eas
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Drives: BMW
Join Date: Nov 2005
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Quote:
Originally Posted by M3takesNYC View Post
replacing just the filter with a high flow will give you 4-5hp

Replacing the box with MS seems to give you another 3-4hp.

That is why most go with just a filter as even the 3-4 with the MS airbox seems to be hit or miss.

THe stock box is so well designed. Probably the best design I have ever seen on any car including ferraris, lambo, aston and road race cars
The airbox isn't changed, only the Intake Tract assembly & Filter. Here's a dyno that will show incremental gains of the intake vs baseline:



More details of these buildups in this post here:
http://www.m3post.com/forums/showpos...38&postcount=3
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