Ready to Run Distributor - Buick V8 400-455

The MSD Ready to Run Distributor for Buick V8 400-455 engines is a pro-grade ignition component engineered for serious big-block builders and street performance enthusiasts. This ready-to-run unit eliminates the guesswork of traditional distributor setup, arriving fully assembled with magnetic pickup technology and HEI-style terminal configuration. Whether you're restoring a classic Buick muscle car or upgrading an existing 400 or 455 cubic-inch engine, this distributor provides a complete plug-and-play solution that simplifies installation while delivering reliable spark distribution across the full RPM range.

Built with MSD's pro-billet construction, this distributor features a magnetic pickup system that generates precise trigger signals for consistent ignition timing without the wear and maintenance issues of breaker points. The integrated vacuum advance mechanism allows the distributor to automatically adjust timing based on engine load and throttle position, optimizing efficiency across cruising and wide-open-throttle conditions. The HEI-style terminal accepts modern ignition components and wiring harnesses, reducing compatibility headaches and enabling easier future upgrades or troubleshooting. Compact dimensions (6.9 x 6.9 x 19.1 inches) ensure fitment in tight engine bays without requiring extensive clearance modifications.

This distributor is ideal for owners of big-block Buick engines—particularly 400 and 455 models found in full-size sedans, muscle cars, and street rods. The ready-to-run design appeals to mechanics and builders who want proven performance without the labor-intensive task of degree-wheel tuning or individual component sourcing. Installation typically requires only dropping the unit into the existing distributor hole, connecting the vacuum line, and attaching the HEI harness—a job achievable in under an hour on most vehicles. The red finish and quality construction reflect MSD's reputation in the performance ignition market, making this distributor a reliable choice for weekend warriors and dedicated enthusiasts alike.