Standard Ignition GB-330 Distributor Rotor

Distributor Rotor for BMW and Mercury Applications

Standard Ignition GB-330 is a distributor rotor built with a phenolic rotor body and brass contact material for ignition system service. It uses a push-on mount and is finished in brown for a direct replacement-style fit in supported applications.

Compatible with 1979-1981 BMW 528i and 1972-1974 Mercury Capri applications, this Standard Ignition distributor rotor is a practical service part for restoring distributor function. The GB-330 is supplied as the rotor only; distributor cap and screws are not included.

Key Features

• Standard Ignition GB-330 distributor rotor
• Push-on mount type for supported distributor designs
• Brass contact material for rotor terminal contact
• Phenolic rotor material for ignition service use
• Brown color/finish
• Fits 1979-1981 BMW 528i and 1972-1974 Mercury Capri applications

Detailed Description

The GB-330 distributor rotor is designed for ignition distributor service where the rotor transfers spark from the center terminal to the distributor cap terminals. Its brass contact material and phenolic construction support consistent electrical contact in the distributor assembly. For buyers searching for a Standard Ignition GB-330 distributor rotor, this part matches the listed BMW 528i and Mercury Capri fitments, including 1974 Mercury Capri except distributor No. 74TF-12100TA.

This part cross-references D163 and EP407 for the same application.

What It Helps Address

• Engine misfire caused by worn rotor contact surfaces
• Weak or inconsistent spark transfer inside the distributor
• Ignition performance issues from cracked or deteriorated rotor material
• Distributor service needs during cap-and-rotor maintenance
• Replacement of a damaged rotor in supported BMW 528i and Mercury Capri applications

Installation Notes and Tips

Verify distributor part number and application before installation. The GB-330 uses a push-on mount and does not include distributor cap or screws, so inspect those components separately during service. Confirm the rotor seats fully on the distributor shaft and that the cap terminals are clean before reassembly.

Quality Assurance

Standard Ignition GB-330 is built as a service replacement rotor for the listed applications and is identified by OE and aftermarket interchange references for fitment verification.