Its a really good, well built bit of kit but the suction noise is really loud, it actually sounds like the air is being blown straight into your air vents when the windows are up.
I like the dump/flutter but the constant rushing of air is quite annoying. i think the noise is being caused buy the filter enclosure, swishing air around while its under a small load. when your fully boosting its silent then you can hear a loud dump when letting off.
I think im going to buy two foam filters to replace the cans on the end and see if that gets rid of the noise.... Anyone tried that??