MSD 83831 Distributor

Vacuum advance canister for improved economy (can be locked out) CNC machined billet aluminum housing and billet aluminum base Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range Polished steel shaft is QPQ coated and guided by a sealed ball bearing Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction Mechanical advance assembly can be locked out for crank trigger systems Advance weight pins are staked and tig welded to the plate Nylon pads ensure smooth operation of the advance weights Requires an MSD Ignition Control May hit firewall seam on '57-'59 full size cars.