Quote:
Originally Posted by Andy@LTBMW
The difference is the design of the intakes. The BMW performance intake has a wider channel for air to flow into compared to a stock intake box. The filter is a flat panel. The gruppe M is a open intake and doesn't have a enclosure. The filter is a cone. I would say that in terms of cabin noise, the gruppe M produces a lot more noise, while the box is quieter simple because of the flat fliter versus a cone filter. I have a gruppe M and it usually kicks in after 2500 rpm compared to a stock intake which is pretty even.
I feel there is a huge difference when I run a gruppe M veruss the stock box.
I think the Dinan intake maybe able to get you a little bit colder air, but because of the intake box design, I can't see how much of a difference it would make.
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Thank you, didnt know about the actual construction of each one that helps a lot. Is one type more susceptible to torque loss at a low RPM than the other?