MSD 8406 Distributor Cap and Rotor Kit GM HEI External Coil Red

The MSD 8406 is a replacement distributor cap and rotor kit designed specifically for GM HEI distributors with an external coil configuration. Like the oil and filter in your engine, the distributor cap and rotor are critical maintenance items that should always be replaced together as a matched set to maintain reliable ignition performance.

MSD takes the guesswork out of replacement by pre-matching the correct rotor to the correct cap in a single kit. The 8406 is engineered as a direct-fit replacement for MSD distributor PN 8366, as well as compatible GM V8 EFI distributors with an external coil.

Key Features:

• Rynite Construction: Injection-molded from high-quality, voltage-insulating Rynite material for superior dielectric strength and durability
• Stainless Steel Terminals: Corrosion-resistant stainless steel terminals for reliable, long-lasting spark transfer
• Brass Terminal Contacts: Brass contacts resist carbon tracking for cleaner, more consistent spark delivery
• HEI Male Cap Style: Male/HEI cap style for proper fitment on GM HEI external coil distributors
• Screw-Down Mounting: Secure screw-down attachment style prevents cap movement and ensures consistent ignition
• Signature Red Finish: Distinctive MSD red cap for easy identification in the engine bay
• Sold as a Complete Kit: Includes both distributor cap and rotor — no separate parts to source
• Emissions Legal: Legal for use on emissions-controlled vehicles, uncontrolled vehicles, and racing applications

Whether you're performing routine ignition maintenance or upgrading to a performance distributor, the MSD 8406 cap and rotor kit delivers the quality and fit you expect from MSD Ignition.