Dist. Cap & Rotor Kit - BMC 4-Cylinder

The Dist. Cap & Rotor Kit - BMC 4-Cylinder by Pertronix Ignition is a precision ignition system upgrade designed for British Motor Corporation vehicles and period-correct restorations. This distributor cap and rotor assembly replaces OEM wear items that degrade over time, causing weak spark delivery, misfires, and rough idle—common issues in vintage BMC engines. Whether you're rebuilding a classic Austin, MG, or Morris, or maintaining an existing BMC power plant, this kit restores reliable spark distribution across all four cylinders.

Pertronix manufactures this cap and rotor pair to exacting specifications, ensuring proper electrical contact and arcing resistance under load. The rotor blade delivers consistent spark timing to each cylinder terminal, while the cap's internal geometry and terminal alignment prevent cross-fire and carbon tracking—two failure modes that plague aged distributors. Made from high-dielectric molded polymer, this assembly provides a reliable foundation for your ignition system, particularly when paired with Pertronix electronic ignition upgrades that eliminate point wear.

This kit benefits enthusiasts performing routine maintenance, engine rebuilds, or converting to electronic ignition systems on BMC four-cylinder engines. Installation is straightforward—simply remove the old cap, swap the rotor, and reinstall the new components. With its precise design and quality materials, this kit is an essential upgrade for any vintage BMC engine enthusiast.