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Spark Plugs

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99917022390
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Product Information
Spark Plug FGR 5KQEO.
6 Required per engine. Price is for each.

porsche

Fits:
Porsche 996 Carrera 3.6L 2001>>
Porsche 987 Boxster 2.7L / 3.2L 2005-08
Porsche 987C Cayman 2.7L / 3.2L 2005-08
Porsche 997 Carrera 3.6L / 3.8L 2005-08

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Related, superseded, cross reference or alternative numbers for comparison.

99917022390
99917022390
0242245559
9991700IK22

The product you are viewing cross references to these numbers
Special Offer
99917022390/1
Product Information
Product Information
Spark Plug FGR 5KQEO.
6 Required per engine. Price is for each.

bosch

Fits:
Porsche 996 Carrera 3.6L 2001>>
Porsche 987 Boxster 2.7L / 3.2L 2005-08
Porsche 987C Cayman 2.7L / 3.2L 2005-08
Porsche 997 Carrera 3.6L / 3.8L 2005-08

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Related, superseded, cross reference or alternative numbers for comparison.

99917022390
99917022390
0242245559

The product you are viewing cross references to these numbers
Special Offer
99917022390/3
Product Information
Product Information
Spark Plug FGR 5KQEO.
The spark plug delivers a precise electrical spark to ignite the air-fuel mixture in the combustion chamber. This critical function ensures efficient combustion, smooth engine operation, consistent power delivery, and proper fuel economy.
6 Required per engine. Price is for each.

Fits:
Porsche 996 Carrera 3.6L 2001 - 2005
Porsche 987 Boxster 2.7L / 3.2L 2005 - 2008
Porsche 987C Cayman 2.7L / 3.2L 2005 - 2008
Porsche 997 Carrera 3.6L / 3.8L 2005 - 2008

Improper or worn spark plugs can cause rough idle, poor throttle response, misfires, and reduced fuel economy. This OE Match spark plug restores proper ignition timing and combustion performance, helping your Porsche run smoothly and efficiently.

Designed for direct installation without modification, this plug is ideal for engine tune-ups, maintenance services, and restorations where an OE-equivalent part is required.

Function:
Generates the ignition spark to start and sustain combustion
 Helps maintain smooth idle and acceleration
 Optimizes engine fuel efficiency
 Designed to match OE Porsche heat range and performance.

A worn or incorrect spark plug can lead to engine misfires, rough running, reduced power, increased emissions, poor fuel economy, and hard starting. Replacing old or degraded plugs with a high-quality OE Match spark plug ensures proper ignition, reliable starting, smooth performance, and long-term engine health.

When to replace:
  Rough idle or misfires
  Poor acceleration or throttle response
  Increased fuel consumption
  After the manufacturer’s recommended interval
  During regular engine tune-up or service

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

99917022390
99917022390
0242245559
9991700IK22
FGR 5KQEO

The product you are viewing cross references to these numbers
DISPLAYING 17 to 19 (of 19 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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