Keep spark reaching every cylinder in the right order with the Standard Ignition Distributor Cap GB-425. It's a direct-fit replacement for a long list of imports and domestics, including the 1981-1986 Alfa Romeo GTV-6 and 1987-1989 Alfa Romeo Milano, several BMW models, the Ford Mustang II, Ford Pinto, Mercury Capri, Porsche 911, and Volvo 164 (see the "Vehicles it fits" section for the full application list).
The distributor cap covers the distributor and carries high-voltage current from the coil to each spark-plug wire through its internal terminals as the rotor sweeps past them, distributing spark in the engine's firing order.
- Routes the spark: transfers coil voltage to the individual plug-wire towers in sequence.
- Protects the internals: encloses the rotor and terminals against dirt and moisture.
- Direct-fit design: installs on the listed applications as a replacement for the original cap.
Cracks, carbon tracking, corroded terminals, or moisture inside a worn cap can cause misfires, rough running, and hard starting. If a failed distributor cap is the cause of these symptoms, this replaces it; diagnose the cause before replacing.
Manufacturer part number GB-425 (also GB425).
Frequently Asked Questions
What does a distributor cap do?
It covers the distributor and routes high-voltage current from the coil to each spark-plug wire terminal as the rotor passes, distributing spark to the cylinders in firing order.
Will this cap fit my vehicle?
It's listed for applications such as the Alfa Romeo GTV-6 and Milano, several BMW models, Ford Mustang II, Ford Pinto, Mercury Capri, Porsche 911, and Volvo 164. Check the "Vehicles it fits" section to confirm your exact year and model.
What are signs a distributor cap may need replacing?
Cracks, carbon tracking, corroded terminals, or moisture inside the cap can lead to misfires, rough running, and hard starting. Diagnose the cause before replacing.
What is the manufacturer part number?
This is Standard Ignition distributor cap, manufacturer part number GB-425.
Does this fit the Porsche 911?
Yes, it is listed for the 1976-1983 and 1985-1989 Porsche 911. Confirm your exact year in the "Vehicles it fits" section before ordering.
