Help keep high-voltage spark reaching every cylinder of your classic with the Standard Ignition Distributor Rotor AL-99. It is a replacement for a long list of vintage applications, including the 1946-1949 Chrysler Town & Country and 1952-1955 DeSoto Firedome, plus Dodge, Hudson, Jeep, Kaiser, Lincoln, Nash, Packard, Plymouth and Studebaker models. See the "Vehicles it fits" section for the full list and engine details.
The rotor turns with the distributor shaft. It carries the ignition coil's high-voltage current from the center of the distributor cap to each spark plug terminal in firing order.
- Original equipment ignition maker: Standard Ignition is a global manufacturer of original equipment ignition products. It maintains complete quality control throughout manufacturing, from componentry to the finished product.
- Dielectric alkyd: High-grade dielectric strength alkyd resists dirt sticking. This decreases carbon tracking for extended service life.
- Solid brass segments: The segments are designed for better conductivity and a higher-voltage spark to the plugs.
- Shaft retention clips: Clips are used where the application requires them, for proper fit and performance on the distributor shaft.
Signs that a distributor rotor may need replacing include misfires, hard starting, rough running, or a rotor tip that looks burned, worn or cracked. If a worn rotor is the cause, this part replaces it. Inspect the distributor cap at the same time.
Interchange: D104 · 391898253029 · 641161 · 868096 · MA903 · AL65 · 8EL12200 · 89056616 · 3915088 · 3917057 · 417
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
D104, 391898253029, 641161, 868096, MA903, AL65, 8EL12200, 89056616, 3915088, 3917057, 417
Frequently Asked Questions
What does a distributor rotor do?
It spins with the distributor shaft and routes high-voltage current from the coil, through the center of the distributor cap, to each spark plug terminal in firing order.
Which vehicles does the Standard Ignition AL-99 fit?
It fits many classic vehicles, including the 1946-1949 Chrysler Town & Country and 1952-1955 DeSoto Firedome. See the "Vehicles it fits" section for the full list.
What is the AL-99 rotor made of?
Standard Ignition states it uses high-grade dielectric strength alkyd, which resists dirt sticking and decreases carbon tracking, with solid brass segments for better conductivity.
What are signs of a failing distributor rotor?
Possible signs include misfires, hard starting, rough running, or a burned, worn or cracked rotor tip. Diagnose the ignition system first, since these symptoms can have other causes.
Which part numbers does AL-99 interchange with?
It cross-references D104, 391898253029, 641161, 868096, MA903, AL65, 8EL12200, 89056616, 3915088, 3917057 and 417.
