Dist. Cap & Rotor Kit - BMC 4-Cylinder

The Dist. Cap & Rotor Kit for 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. Compact at 3.15 x 3.05 x 4.35 inches and weighing just 0.36 lbs, the assembly fits within the original BMC distributor housing without modification. High-dielectric materials and precision-molded contacts create 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 assembly—making it an ideal first upgrade before tuning or troubleshooting ignition issues. Mechanics and restorers trust Pertronix for OEM-fit quality and long service life, ensuring your vintage British machine fires cleanly and idles smoothly. Verify fitment against your specific BMC model's distributor type before purchase.