LM Regs 5.4.1b
Quote:
Any device that allows the modification of the valve opening timing and/or lift is considered as variable valve timing.
This is authorised only for engines derived from a series production engine fitted with a variable valve timing system, and it must remain original.
The vehicle from which the engine originally comes must have a "Full type" road homologation and must be produced in a minimum of 200 units in 12 consecutive
months.
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Thus a multiair engine would be allowed and Fiat/Abarth are surely selling a lot more than 200 units per year.