Injection System Installation Kit, Mount, Water / Methanol, 1/2 Gal. Plastic Reservoir, Holley water/methanol injection system installation kits are designed for use with Holley HP and Dominator EFI systems. They're programmed for 100 percent water and up to a 50/50 percent mixture of water and methanol--never use more than 50 percent methanol in the mixture, or damage to components may result. These are installation kits only; a pump and solenoid(s) are required, as well.