Distributor Base

The MSD Ignition Distributor Base (ASY11291) is a low-profile crank-trigger distributor base engineered for high-performance Chevy V8 applications requiring compact ignition architecture. This component serves as the foundation for MSD's crank-trigger distributor system, enabling precision timing control in competition and high-output street engines where traditional distributor-based ignition falls short.

Weighing only 0.29 lbs with compact dimensions of 4.8 x 1.95 x 4.85 inches, the ASY11291 distributor base integrates seamlessly into tight engine bays where space is limited. The low-profile design eliminates hood clearance issues common in modified small-block builds while maintaining the structural rigidity required for reliable crank-trigger operation. MSD's engineering focuses on eliminating ignition variables—crank-trigger systems eliminate distributor shaft wear and mechanical slop that degrade timing accuracy under load, critical for consistent performance across varying RPM ranges.

Builders and tuners rely on crank-trigger systems when stock or worn distributors introduce timing drift that costs horsepower and creates cold-start inconsistencies. The MSD Ignition Distributor Base ASY11291 is specified for serious street and strip builds where precision trumps convenience. Pairing this base with MSD's full crank-trigger ignition package provides the stable, repeatable timing platform required for engine management tuning and reliable performance under boost or nitrous oxide augmentation. The part number ASY11291 is the verified OEM component for MSD's crank-trigger distributor architecture.