i don't no about the gains but my brothers trucks in jamaica uses a similar system not sure how it works though but i'm sure alot of british haulage trucks use these systems as well
 
An LPG conversion is one thing, maybe well suited for high mileage cars etc., but I for one are way more interessted in adding a little burst.. powershot
 
Their claims sound far to good to be true.

Yeah i will agree ... a standard CR170 going up to 270bhp with an LPG conversion!!
Why dont all get this instead of a map.

That means if i get it with max increase i will be bordering on 340bhp ... no chance.
Even with a 25% increase it will be pushing 270bhp.

i think it will be a lot less than that!! :(