Here's a link to installation instructions if anyone is curious. This company is offering kits for 4-6 and 8 cylinder engines.
I asked him about California regulations and he said.. " this is for off road use only "

I guess just like the HID bulbs and all the rest of the aftermarket parts for sale.
Even a K&N filter is "for off road use only"

http://www.dudadiesel.com/files/propane/propanemanual.pdf


Here's a nice Video of an install on a Porsche Cayenne in UK
http://www.youtube.com/watch?v=ifDtBhP65O8

Looks pretty clean.

The more i read about it the more i want it. People associate the LPG conversions to the old single point systems that would feed one line to the intake manifold next to the MAF sensor.
Those systems were primitive and there was nothing electronic in them. A lot of backfires, smells and 'accidents'.

Current systems have an injector for each cylinder that uses manifold pressure to calculate load, oxygen sensor to calculate the unused oxygen, engine and LPG temperature and an ECU that does all the adjustments.
Funny that i read European forums and find lots of positive feedback about it and the few negative comments are usually left by US people.
The current systems auto calibrate the flow of gas and burn very clean. They allow custom mapping and are easy enough to be adjusted by owners using a laptop.
The other times i see negative comments is from people trying to install LPG on 1.8 4 cylinder cars/ Now that's something that will need a lot of time to recover the investment.

I see people commenting.. "well you aren't driving 100 miles a day in a 5.0 engine"
I do. 100 miles commute to work with the V8. And i LOVE my car. Don't want a Prius. I ride a bike normally but the season will soon be over and don't feel like paying gas stations that much.

The systems perform constant auto testing and will alert you in case of a leak. Premium Gas is 4.4 in California and i can bet money that it will never be cheaper. 2.10$ for LPG
Even if i loose 20% of my engine Horse Power i'm fine with cruising the CL500 @ 260hp

The Propane tanks fit nicely in the spare wheel compartment and i would throw away the spare either way (that's what AAA membership is)
Lots of EU companies will ship to US. And the price you pay for the Front Kit alone in the US can get you a Full kit with a nice tank from EU.

All the shuttle companies, buses and fleet vehicles use LPG in the US. I don't think they do it for the sake of environment. Why wouldn't we do the same. I understand if you have a 4 banger honda, it wouldn't make sense. But on a big V8 or V12 it would be worth it.
Mercedes, Honda, Volvo, Mitsubishi all make LPG cars. And i really doubt you will see the Mercedes stamp on LPG components. They will have a BRC or other big LPG manufacturers label on them.

What am i missing ? Is this another brain wash ?