Description MSD85555 by MSD IGNITION -Distributor- Pro-Billet PRO-BILLET DISTRIBUTORS Distributors are machined from 6061-T6 solid billet aluminum with an upper sealed ball bearing to eliminate shaft wobble. A Dupont Rynite distributor cap, adjustable mechanical advance, hardened 10,000 RPM plus shaft, and high output magnetic pickup assure years of reliable service. Most distributors listed require an MSD Ignition Control unless specified
