High Pressure. Program in an exact flow amount into the software, and that flow is injected into the engine. This makes tuning a very simple and accurate process.
Holley EFI 557-101 Water Methanol Installation Kit
Holley Efi 557-100 Water/Methanol Injection Pump
Holley EFI 557-100 Water Methanol Pump
Holley EFI 557-106 Water/Methanol Injection Solenoid/Nozzle
Holley EFI 557-100 Water/Methanol Injection Pump
Holley EFI 554-115 Water/Methanol Driver Module