Ford 351W, Magnetic Trigger, Vacuum Advance

MSD8478

D8478

Billet housing is 5/8" smaller in diameter than stock Ford distributors. Easy-to-adjust mechanical advance with supplied springs and stop bushings. Vacuum advance canister for improved economy (can be locked out). CNC machined billet aluminium housing and billet aluminium 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. Supplied with small diameter cap with HEI style terminals and race rotor (will accept apt). Requires the use of a separate ignition box, such as an MSD 6, 7, 8, or 10 Series ignition The Street Pro-Billet is a popular route for people looking for proven race performance for their street cars. A vacuum advance canister provides economy and the proven MSD mechanical advance gives you the opportunity to dial-in a timing curve to fit your needs. Inside, an oversized steel shaft is QPQ-coated for low friction and rides in a sealed ball bearing at the top of the distributor with an extra-long sintered bushing at the bottom. This combination keeps the shaft steady creating accurate spark delivery at any rpm. The Street Pro-Billet relies on a magnetic pick-up to trigger the MSD Ignition Control which delivers the powerful sparks to the coil. This pick-up is extremely accurate and never needs adjusting.