Spark plug FR5DTC, Platinum-iridium. Porsche 964 / 964RS / 993 / 993RS  ❭  99917018390

Spark plug, FR5DTC, Platinum-iridium
High-quality OE Match platinum-iridium spark plug designed as a direct replacement for Porsche factory spark plug. It is engineered specifically for classic and air-cooled Porsche engines, including 964 and 993 models, where precise combustion and reliability are essential.
Sold individually, 12 spark plugs required per engine.

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L 1991 -1993 M64.03

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS M64.20 1994 - 1997

The spark plug generates a precisely timed electrical spark to ignite the air-fuel mixture inside the combustion chamber. The platinum-iridium construction ensures stable ignition, efficient combustion, and long-term performance consistency.

Function:
•  Produces a reliable ignition spark for efficient combustion
•  Platinum-iridium electrodes improve durability and spark consistency
•  Supports smooth idle and responsive throttle behaviour
•  Helps maintain fuel efficiency and controlled emissions

Spark plugs in air-cooled engines are exposed to high operating temperatures and sustained combustion stress. Worn or incorrect plugs can cause misfires, rough running, reduced performance, and poor fuel efficiency. Replacing worn plugs with an OE Match platinum-iridium spark plug restores stable ignition, balanced combustion, and helps preserve engine longevity and performance.

When to replace:
•  Engine misfires or uneven idle
•  Hesitation or reduced throttle response
•  Increased fuel consumption
•  At manufacturer-recommended service intervals
•  During routine engine servicing or tune-ups


Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99917018390

The product you are viewing cross references to these numbers