Keep the spark going to every cylinder with the Standard Ignition Distributor Cap GB-421. It routes high-voltage current from the ignition rotor out to each spark plug wire in the correct firing order, and it installs as a direct-fit replacement for the listed classic applications — including the 1964-1970 Volkswagen Beetle, 1964-1970 Volkswagen Karmann Ghia, 1963-1969 Volkswagen Transporter, and the 1966-1967 NSU Prinz. See the full year-make-model coverage below.
- Distributes ignition voltage: transfers the coil's high-voltage output from the rotor to the individual plug-wire terminals to fire each cylinder.
- Covers and protects the distributor: shields the internal contacts from dirt, moisture, and debris that can cause misfires.
- Direct-fit replacement: designed as a direct-fit replacement for the listed applications.
Signs this cap may need replacing include hard starting, rough idle, misfires, or arcing/carbon tracking on a cracked or corroded cap. Because these symptoms can have other causes, diagnose the ignition system before replacing.
Interchange: 036905207 · 052905207 · 341905207 · C541 · 1235522027 · 1235522031 · RB910 · EP145 · 12309020 · 21941201 · 21941202 · BDC10 · DC33 · DC45 · EP145SB · 594115 · 594131 · 111905207C. Manufacturer part number GB-421 (also GB421).
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
036905207, 052905207, 341905207, C541, 1235522027, 1235522031, RB910, EP145, 12309020, 21941201, 21941202, BDC10, DC33, DC45, EP145SB, 594115, 594131, 111905207C
Frequently Asked Questions
What does the GB-421 distributor cap do?
It routes high-voltage current from the ignition rotor to each spark plug wire in the correct firing order, and covers the distributor to protect the internal contacts from dirt and moisture.
What vehicles does this cap fit?
It fits the 1966-1967 NSU Prinz, 1964-1970 VW Beetle, 1968 VW Campmobile, 1972-1973 VW Combi, 1966-1973 VW Fastback, 1964-1970 VW Karmann Ghia, 1966-1973 VW Squareback, and 1963-1969 VW Transporter.
What are signs the distributor cap needs replacing?
Hard starting, rough idle, misfires, or visible cracks, corrosion, or carbon tracking. Diagnose the ignition system first, since these symptoms can have other causes.
Which part numbers does GB-421 cross-reference?
It interchanges with 036905207, 052905207, 341905207, C541, 1235522027, 1235522031, RB910, EP145, 12309020, 21941201, 21941202, BDC10, DC33, DC45, EP145SB, 594115, 594131, and 111905207C.
Is this a direct-fit replacement?
Yes. It is a direct-fit replacement for the listed applications. Confirm your vehicle in the "Vehicles it fits" section before ordering.
