The Pertronix 9LU-142A Ignitor II kit converts Lucas 25D4 4-cylinder distributors from points to electronic ignition, a common fit on 1960s and 1970s British cars such as MG, Triumph, and Austin. Ignitor II adds adaptive dwell control for stronger, more consistent spark. It installs inside the original distributor for a stock look and needs no external box. Match the distributor model to the Pertronix list before ordering.
- Type: Ignitor II points-to-electronic conversion kit
- Trigger: Magnetic with adaptive dwell
- Voltage: 12 Volt
- Ground: Negative
- Cylinders: 4
- Fits: Lucas 25D4 4-cylinder distributors
- Sold as: Complete kit
- Part number: 9LU-142A
FAQ
What does the Pertronix 9LU-142A kit do?
It replaces the breaker points inside Lucas 25D4 4-cylinder distributors with a self-contained Ignitor II electronic module, ending point wear, misfire, and periodic point adjustment.
Does this kit need an external ignition box?
No. The module fits inside the original distributor and keeps the stock appearance, so no separate ignition box is required.
How do I confirm the kit fits my distributor?
Fitment is distributor-based. Match your distributor model against the Pertronix application list, or use the Pertronix Distributor Lookup, before ordering.
Which cars use the Lucas 25D4 distributor?
The Lucas 25D4 is common on 1960s and 1970s British 4-cylinder cars such as MG, Triumph, and Austin. Verify your distributor against the Pertronix list.
