PERTRONIX CLOCKWISE VACUUM LOCKOUT FOR ALL FLAME-THROWER HEI DISTRIBUTORS AND GM 8-CYLINDER HEI DISTRIBUTORS.
Vacuum Advance & Lockout
Vacuum Advance & Lockout
- These 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.