hi ,
I have both if your exhaust valves are inconel not have to use it for a short time. temperatures rise by much. you have a great spool, but the car does not brake :D I mounted a electric power brake vacuum pump. ;)
I also had this problem.
is the MAF sensor.
carefully reading it wrong sends incorrect information to the ECU. you could have a rich or lean fuel mixture.
in 10 years I have changed maf sensor 7.
I now have a racing ECU that has been permanently deleted
hi
my experience is positive, but it is not installed on a subaru. here in Italy LPG costs half of petrol, a big savings. Italian in my club there are 2 people that are fitted with a lpg on subaru sti. 27000 km and no problem