I have talked to Rob Levinson and he is a very smart dude but a quote in e-mail does not really mean anything.
The airbox in 540I is velocity stack you are right but if you talk about performance I have gotten better HP (small gain 3-5hp but better) on CAI with block off plate (K&N based).
The only thing that was better about stock unit is it was more consistant while CAI suffered from some heat soak but this was on a 95+ day in NYC.
And like i mentioned before my oil and engine are 100% after running K&N so that claim of 'particles' is just that a claim. Think about it.. those particles stay on the filter 99.99% of the time and when they do fly they are so small that with current oil nothing will ever be damaged.
Also let's not forget that UCC sells aFE brand of intakes (competitor): http://store.uucmotorwerks.com/share...t=products.asp
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Last edited by 1995i540; 10-16-2012 at 04:44 PM.