[quote author=stretch link=topic=70133.msg1251834#msg1251834 date=1173201414]
CPE chimed in over at Mazda247, and I think this is certainly pertinent information to this thread, too:
[QUOTE author=www.cp-e.com]Thanks for explaining the process to everyone stretch. I think people are assuming that our MAF housing is 2.75" like the Mazdaspeed piece, but it is not. we can't disclose the diameter we use, but it is NOT 2.75", it is smaller than that by a good margin. And we don't do that to restrict flow, we do it so we can properly meter the air.
I think it would help if I posted a picture of our MAF housings in transition from raw aluminum into a MAF housing.
In the picture above, you can see the progress from left to right. We start with a 3" aluminum tube and we machine it to the dimensions we want. The center MAF housing has all the correct dimensions, but it still needs an airflow straightener and a MAF flange. Finally, on the right is the finished product, but with the airflow straightener our of the housing so everyone can see it.
And here is a shot of our airflow straightener compared to the stock one. They're similar, but no the same! We had to tweak their design to get it to work properly with our MAF housing.
And we don't do all this extra work because we think its fun, we do it because not paying attention to these details could cause problems later down the road when you continue adding aftermarket parts to the car. Stretch is right on with his arguments.
Jordan[/QUOTE]
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Why would you need a straigthener in a madrel bent tube? It's a different intake the stock vs. the CAI and the air flow is different. Your picture does not tell me anything. It's in/out of square box vs. flow through a mandrel bent tube dude.