Vacuum Advance & LockoutThese vacuum canisters help optimize ignition advance for maximum part throttle performance and cruise speed efficiency. Our vacuum lockout plates allow for precise pickup coil position and accurate rotor phasing. Product Features:PerTronix D9011 Flame-Thrower HEI Distributor Counter Clockwise Vacuum Lockout KitThese vacuum canisters help optimize ignition advance for maximum part throttle performance and cruise speed efficiency.
