MSD 84085 Distributor Cap and Rotor Replacement Kit (Includes 8408 Cap & 8423 Rotor)

The MSD 84085 is a complete distributor cap and rotor replacement kit bundling the MSD 8408 distributor cap and the MSD 8423 rotor into a single, convenient service kit. Designed for MSD Pro-Billet distributors and MSD Cap-A-Dapt systems on Ford V8 applications, this kit ensures both critical ignition components are replaced together for optimal ignition performance.

The included MSD 8408 cap is injection molded from DuPont® Rynite — a high-strength thermoplastic with excellent dielectric properties that resists voltage leakage and withstands the harsh underhood environment. The cap features Male/HEI-style spark plug terminals with stainless steel contacts for improved locking connections and low-resistance conductivity. A clamp-down attachment style secures the cap firmly to the distributor, and a plug wire retainer is included to lock spark plug wires in place. The Ford-style cap includes a separate provision for routing the coil wire independently.

Key Features:

• Complete kit includes MSD 8408 distributor cap and MSD 8423 rotor
• Cap injection molded from DuPont® Rynite for superior strength and dielectric performance
• Male/HEI-style terminals with stainless steel contacts for secure, low-resistance connections
• Clamp-down cap attachment style
• Separate coil wire routing provision (Ford HEI style)
• Plug wire retainer included
• Red finish — matches MSD distributor aesthetics
• Legal for use on emissions-controlled, non-emissions-controlled, and race-only vehicles
• UPC: 085132840854

Replacing the cap and rotor together as a set is considered standard ignition maintenance — much like changing your oil and filter. The MSD 84085 kit makes this service straightforward by supplying both matched components in a single part number.