Spark plug. Porsche 911 3.2L 1984-89 *Non Catalyst  ❭  99917015790

Spark plug WR4CC.
Original Equipment spark plug manufactured by Porsche to the factory specification for the ignition system. A spark plug’s core function is to ignite the compressed air-fuel mixture inside each cylinder of the engine. It produces a controlled electrical spark at exactly the right moment, initiating combustion to deliver efficient power output and smooth engine performance.
Sold individually, 6 Required per engine.

Fits:
Porsche 911 3.2L Carrera 1984 - 1989
* Non Catalyst

Functions & Technical Role:
•  Ignition ignition source: Generates spark for combustion on demand.
•  Engine performance stability: Supports consistent firing across all cylinders.
•  Fuel efficiency and emissions: Proper spark timing improves combustion and helps maintain efficient fuel use.
•  Engine durability: Correctly specified plugs prevent misfires and reduce stress on ignition components.
•  Plug Type: WR4CC, factory-recommended use.

Spark plugs are critical to efficient combustion and smooth engine performance. Over time, wear, carbon build-up, and heat cycling reduce spark strength, leading to misfires, poor throttle response, and increased fuel consumption. Replacing worn spark plugs with Genuine Porsche OE parts restores correct ignition timing, protects engine components, and keeps your 911 running as Porsche intended.

When to replace spark plugs:
•  At manufacturer-recommended service intervals
•  During routine engine servicing or tune-ups
•  If experiencing misfires, rough idle, or hesitation
•  When starting becomes harder than normal
•  If fuel economy decreases
•  During engine rebuilds or restoration work
•  After prolonged storage before returning the car to use

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