Quote:
Originally Posted by JCL
1) The stock (original equipment) air intake is a cold air intake. I haven't taken apart an E70 intake, but this was true on every other BMW I owned, so I suspect it is true on the E70 as well.
2) The restriction in the stock intake is negligible.
3) Aftermarket CAIs commonly take their air, paradoxically, from under the hood. Those that do are in fact hot air intakes, despite the marketing labels attached to them.
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I have no knowledge of the first two points where the BMW is concerned. And agree with the last. My Twin-Turbo CAI is a custom modification of the stock box and and it breathes true cold air from outside the engine compartment; it does a great deal to lower both the charge and inter-cooler body temperatures as measured before and after installation.
I just wanted to know why there seemed to be a blanket "not worth it statement."
Thanks