If you can actually *find* someone who has done this conversion
successfully, there should be no problems I would think. Personally, I
reckon the extra cost and work involved would not make sense unless you were
doing over 35000miles per annum.
After working for 7 years with one of the biggest Dutch LPG conversionkit
producers I can only advise you not to convert your M3 to LPG.
With al the modern electronics in the cars even the most advanced LPG kits
are rubish. Lots of problems with back-fire and burning of valves and head
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