I've decided to finish my project TTZ. I have a HKS VPC and GCC unit, I'm planning on installing bigger injectors and eliminating the MAS air flow system, here Lies my problem! The system is a bit antiquated, but it still works great. I'm having difficulties trying to locate a ROM chip for the VPC set for 550cc or 555cc injectors. Any information or guidence where I can locate one will be much appreciated. Thank You in advance