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- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
OE Match spark plug set (pack of 8) designed as a direct replacement for Porsche factory spark plugs in fit, heat range, and ignition performance. Supplied as a complete set of eight, it is intended for Porsche engines requiring this spark plug specification where a full eight-plug replacement is needed.
PACK OF 8
Fits:
Porsche 928S / 928S2 / 928S4 / 928GT 1983 - 1991
Porsche 928 GTS 1992 - 1995 (M28.49/50)
This OE Match spark plug set contains eight identical spark plugs, each manufactured to OE-equivalent standards for materials, electrode design, and thermal performance. Engineered to withstand high combustion temperatures and sustained electrical load, these plugs deliver consistent ignition and balanced combustion across all cylinders.
Replacing spark plugs as a complete set ensures even ignition timing and smooth engine operation. Over time, worn or mismatched plugs can lead to misfires, hesitation, reduced throttle response, and increased fuel consumption. This OE Match pack of eight offers a cost-effective alternative to genuine OE parts while preserving correct performance, reliability, and direct-fit compatibility.
All spark plugs install without modification, making this set ideal for scheduled servicing, tune-ups, or ignition system maintenance.
The spark plugs generate precisely timed electrical sparks to ignite the air-fuel mixture in each combustion chamber. As a full set, they ensure uniform combustion, supporting smooth engine operation, efficient fuel burn, and consistent power delivery.
Function:
• Generates a consistent ignition spark for combustion
• Supports smooth idle and responsive acceleration
• Helps maintain proper fuel efficiency and emissions control
• Direct-fit replacement for easy installation
A worn or incorrect spark plug can cause rough running, misfires, loss of power, and reduced fuel economy. Using a correct OE Match spark plug ensures ignition performance remains consistent with factory expectations, helping preserve engine reliability and long-term efficiency.
When to replace:
• Engine misfires or uneven idle
• Hesitation or reduced throttle response
• Increased fuel consumption
• At manufacturer-recommended service intervals
• During tune-ups or ignition system maintenance
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99917015690
The product you are viewing cross references to these numbers
This kit is comprised of the following items: