Yes, the top line Zavoli systems came with Matrix injectors with a Zavoli sticker. Somebody paid a lot of money to have that system installed.

They certainly did on my Zavoli system (with the magic Matrix injectors)
£2643.75 in January 2006, 168,000 miles ago

I am happy bunny then! Well at least I will be when I get the engine swapped over! LOL

Back then (2006) AEB based systems were generally sold as boxed kits, Zavoli and OMVL both systems that were sometimes supplied with Matrix injectors rather than respective own brand injectors. I used to fit mostly OMVL gear, sometimes I wasn't even advised by the supplier that they'd be sending Matrix injectors rather than OMVL injectors and there was no difference to me in cost. Back then most engine bay components were around double today's prices but Matrix injectors were probably just a bit more expensive than they are now. I didn't fit many Matrix injectors on P38s, instead I horded them to fit on vehicles that could make better use of the better Matrix injector performance ;-) No downsides for the customer because by that year OMVL injectors were also very reliable, they were always well on top of the job for a P38 and in any case the customer would have paid his deposit expecting all OMVL bits... But lots of positives for the more demanding vehicles that then got Matrix injectors rather than OMVL injectors. In 2006 I'd have converted the P38 with either OMVL or Matrix injectors for about £2k, the old spec OMVL reducers were about on par with Zavoli reducers for reliability but OMVL reducer would have been far more on top of the job in terms of gas flow ability.

What about injector longevity Lpgc?
My matrix one's give an almost inaudible rustle after 160 000 miles. The "conventional" ones that I've heard, rattle like castanets after 50 000 miles.

For completeness, the reason why the Matrix injectors supplied with a Zavoli system have Zavoli stickers on them is that in Italy the whole system must come from one manufacturer. This also explains why multitudes of different systems use the AEB controller but with a different label (and firmware). That way a Zavoli system will use a Zavoli reducer but other bits from different manufacturers but all bearing Zavoli stickers.

Yeh for sure Matrix XJ injectors would have been better for outright longevity over most others but that's with the benefit of hindsight... Not many vehicles will have been around that had done 100000 miles on any injectors so it wasn't known that Matrix XJ's would be so reliable. Besides the Matrix XJ's there were also Matrix HD's, the latter tended to go down more often than most other injectors (mostly built in temp sensor going wrong but I received quite a few where one channel was dud when brand new). Got to take it all in context too - back then LPG conversions were considered a bit differently by most... these days it's more expected that the ECU will be one brand, injectors may be another, reducer may be another but back then mixing brands could be considered negatively (even though in reality most ECUs were the ubiquitous AEB unit etc), not least because most installers would stick to their usual brand of boxed kit and tell customers that mixing components wouldn't work or shouldn't be done. Sure you could get around that because Matrix injectors would come wearing the Zavoli / OMVL sticker, but around that time I sometimes converted over 10 P38s in a straight row, some customers came to me for an OMVL system fitting because their mate's P38 that I had converted with OMVL gear ran so well and wanted all the same parts fitting on theirs. I was one of the first UK installers to mix components, I started doing so on the most demanding vehicles first, outcome being that all my customers were happy (since OMVL were great except for on the most demanding stuff, Matrix good on all stuff). There's also the point that if injectors lasted say 120000 miles (say OMVL or Matrix), which person is going to be happier replacing their injectors like for like at that point (OMVL £80 total, Matrix £320) to be good for over another 100000 miles.

All I have to say on the subject is that the better question is to ask "which lpg installer" and leave the choice of equipment to him.

I'll agree with that 100%. All 5 different LPG converted cars I've owned I've taken the system off and put it back on properly.

Agreed with the latest 'depends largely on the installer' points above.
Gilbert's 19:38 post and my 20:12 post will have crossed... Yeh I'd forgotten that's the way it is in Italy... so as Gilbert said what this means in practice is manufacturers who produce bits like injectors and reducers (but not electronics) putting their stickers on electronics produced by AEB, sometimes putting their stickers on injectors produced by some other firm.