Yes, we had our first experience of these efforts last year.
The one we had in had only covered 15,000 miles! After a bit of research and testing we found that many other engine re-conditioners in our area were also coming across inlet valve actuator faults on these particular models.
Part no. should be 0000055257643 £484.89+vat and you'll require gasket: 0000055222222 too.
This link gives a bit of the theory behind this wonderful idea... http://www.pattakon.com/pattakonHydro.htm
These images came in handy too... http://www.google.co.uk/search?q=fiat+multi+air+system&tbm=isch&ei=Pt52VeqfLcLmUu3OgagD
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