Tagal ko na di nag-post dito...

Anyway, I asked Denso Makati (Coolmate yata, along Pasong Tamo) about LPG kits. They now install closed loop systems. Here's the reply I got:

We are now installing closed loop LPG system for carburated and EFI cars. Price of complete unit with installation is Php27,000 for an EFI engine. The brand that we use is EROOM. All imported from Korea including the tank.
FYI lang.