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Spark Plugs

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DISPLAYING 1 to 5 (of 5 products)
Special Order item
PCG60930200
Product Information
Product Information
Spark plug connector.

porsche

Fits:
Porsche 356 1950-65
Porsche 912 1965-69

Click 'Zoom in' for large parts diagram.
Diagram ref no 39

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PCG60930200
PCG60930200
1691900100

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Special Order item
99965903440
Product Information
Product Information
Spark plug protective rubber cap.
sold each.

porsche

Fits:
Porsche 356 B / 356 C  1960-65
Porsche 911 / 912 1965-77
Porsche 914 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 

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Related, superseded, cross reference or alternative numbers for comparison.

99965903440
99965903440

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99965903440/1
Product Information
Product Information
Spark plug protective rubber cap.
sold each.

oematch

Fits:
Porsche 356 B / 356 C  1960-65
Porsche 911 / 912 1965-77
Porsche 914 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 

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Related, superseded, cross reference or alternative numbers for comparison.

99965903440
99965903440

The product you are viewing cross references to these numbers
Special Order item
99917002390
Product Information
Product Information
Spark plug.
4 Required per engine. Price is for each.

porsche

Fits:
Porsche 356 /A (1950 to 1965),
Porsche 356 1600 C/SC and /S/S90 (1960 to 1965) Porsche 911 (1965 to 1969)
Porsche 912 (1965 to 1969)

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Related, superseded, cross reference or alternative numbers for comparison.

99917002390
99917002390
0001435705
14-7 AU

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Special Offer
99917002390/1
Product Information
Product Information
Spark plug.
4 Required per engine. Price is for each.

Fits:
Porsche 356 /A (1950 to 1965),
Porsche 356 1600 C/SC and /S/S90 (1960 to 1965) Porsche 911 (1965 to 1969)
Porsche 912 (1965 to 1969)

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Related, superseded, cross reference or alternative numbers for comparison.

99917002390
99917002390
14-5AU
99917002890
99917002790

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DISPLAYING 1 to 5 (of 5 products)
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About Spark Plugs

Porsche Spark Plugs | Design911 High-Performance Ignition Components for Power & Efficiency

Spark plugs play a vital role in the performance, efficiency, and reliability of your Porsche’s engine. They ignite the air-fuel mixture inside the combustion chamber, creating the precise explosion needed to generate power. High-quality spark plugs ensure clean ignition, smooth acceleration, and reduced emissions — helping your Porsche perform exactly as intended on every drive.

At Design911, we stock a full range of spark plugs from leading manufacturers, engineered for superior conductivity, heat resistance, and long service life. Available in iridium, platinum, and copper-core designs, each spark plug is precision-crafted to match your Porsche’s specific ignition requirements. Ideal for routine maintenance, tuning, or complete engine rebuilds, our spark plugs ensure reliable performance from idle to redline.

What Do Spark Plugs Do?

Spark plugs are critical ignition components that deliver the electric spark required to ignite the air-fuel mixture in the combustion chamber.

Core Functions:
• Create a high-voltage spark to initiate combustion.
• Ensure smooth, efficient engine operation.
• Support optimal fuel economy and throttle response.
• Reduce emissions through clean, consistent ignition.
• Maintain balanced power delivery and idle stability.

When properly maintained, spark plugs enhance both performance and fuel efficiency, ensuring your Porsche runs with precision and reliability.

Why Do Spark Plugs Fail or Degrade?

Spark plugs operate under intense pressure, heat, and chemical exposure — gradually wearing down over time and mileage.

Common Causes of Failure Include:
• Electrode wear from prolonged high-temperature operation.
• Carbon or oil fouling from incomplete combustion.
• Cracked or degraded insulators due to thermal stress.
• Incorrect heat range or plug gap settings.
• Age-related corrosion or weakened spark performance.

Failing spark plugs can cause rough idling, misfires, reduced fuel economy, and loss of power — making regular replacement essential to maintain your Porsche’s performance.

Why Replace or Upgrade Your Porsche Spark Plugs?

Replacing worn spark plugs restores full ignition efficiency, fuel economy, and responsiveness. Upgrading to performance-grade materials can also improve durability and spark precision for motorsport or tuned applications.

Key Benefits:
• Restores smooth acceleration and idle stability.
• Improves fuel efficiency and throttle response.
• Reduces misfires, vibration, and engine hesitation.
• Available in platinum, iridium, and copper-core configurations.
• Compatible with Porsche 911, 944, 968, Boxster, Cayman, Panamera, and Macan models.
• Ideal for servicing, tuning, or complete engine rebuilds.

Design911’s Porsche spark plugs deliver performance, precision, and protection — ensuring consistent ignition and long-lasting reliability for your Porsche engine.

Highlights

• Premium Porsche spark plugs for all engine types.
• Precision-engineered for reliable combustion and performance.
• Available in standard and high-performance variants.
• Improves efficiency, throttle response, and emissions.
• Fits both classic and modern Porsche models.
• Perfect for servicing, performance tuning, or restoration.

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