I ran a Conforti intake with the ITG oiled foam on my E46 330i 6 speed, UUC/Corsa catback exhaust, hi-flow cats and headers. No MAF issues. I like the multi-layer foam because it can hold a lot of dust/dirt and STILL flow like new. Still have the Conforti composite airbox, Carbon fiber tube, filter, and cleaner/oil if anyone wants it.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!