Performance World 689003 Ford 351W Billet Run Ready Distributor

SB Ford 351W High Performance Billet "Run Ready" distributor. Features: built-in rev-limiter, wire retainer, heavy duty cap & rotor and vacuum advance with optional vacuum advance lock-out. Download instructions here - DOWNLOAD Note: A relay MUST be used for 12V+ power supply to ensure clean steady voltage. Failure to use a relay may result in module failure and will void warranty.