The most popular performance distributor from MSD Performance is now available with a black cap that includes 316 stainless steel terminals. The housing is machined from 6061-T6 billet aluminum on a state-of-the-art CNC machine to achieve exact tolerances. The 85557 Pro-Billet distributor offers high-RPM stability, a QPQ coating to reduce friction and corrosion, a high-output magnetic pickup for accurate ignition triggering, and no moving parts to wear or adjust. Plus, MSD has included different springs and stop bushings for application-specific curve tuning.
Note: For use with MSD 6-, 7-, or 8-series ignition. Will not accept a vacuum advance canister.
Features
- CNC-machined billet aluminum.
- New HEI-style black cap with stainless steel terminals and rotor (accepts Cap-A-Dapts).
- O-ring seals can be added to modified blocks.
- Special oil tract improves lubrication to distributor and cam gear.
- Nylon pads ensure smooth advance weight operation.
- Mechanical advance assembly can be locked out.
- Reduced friction on advance plate and weights.
- Maintenance-free magnetic pickup and precision reluctor.
- Easy-to-adjust mechanical advance.
- No CARB exemption order number.
