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Spark Plugs

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DISPLAYING 17 to 32 (of 38 products)
1 2 3
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
90160930901
Product Information
Product Information
Spark plug connector.

porsche

Fits:
Porsche 914 (1970 - 1972)
Porsche 914/6 (1970 - 1972)
Porsche 911 F (1965 - 1973)
Porsche 911 G (1974 - 1976)
Porsche 911 Turbo (1975 - 1976)

Click 'Zoom in' for large parts diagram.
Diagram ref no 26

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90160930901
90160930901
90160930900

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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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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 

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99965903440
99965903440

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Special Order item
99957105202
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Spark plug tool key. 

porsche

To be used with spark plug tools:
477012203A - 911 all & 964 Turbo
99957105402 - 964 (non turbo)

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99957105202
99957105202

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477012203A
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Spark plug wrench. 
Doesn't come with the key. Available separately. Part number 99957105202

porsche

Fits:
Porsche 911 1965-89
Porsche 964 1989-94 Turbo
Porsche 914 1970-76

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477012203A
477012203A

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Special Order item
99917002390
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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)

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99917002390
99917002390
0001435705
14-7 AU

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99917002390/1
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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)

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99917002390
99917002390
14-5AU
99917002890
99917002790

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Special Order item
99917015690
Product Information
Product Information
Spark plug WR 7 DC+
Genuine OE Porsche spark plug, factory-engineered to deliver precise ignition performance, efficient combustion, and reliable operation. Direct replacement part maintaining original Porsche ignition standards.
Sold individually,  4, 6 or 8 required depending on engine type

Fits:
Porsche 911 3.2L  1984 - 89 *with catalyst
Porsche 924S 2.5L 1986 - 1988
Porsche 928S / 928S2 / 928S4 / 928GT 1983 - 1991
Porsche 944 / 944S / 944S2 / 944T 1985 - 1991
Porsche 912E 1976
Porsche 968 1992 - 1995 Coupe

Porsche engines rely on accurate ignition timing and stable combustion, especially under high compression and performance conditions. Using a genuine Porsche spark plug helps maintain smooth idle, crisp throttle response, optimal power delivery, and controlled emissions. It also ensures compatibility with Porsche engine management systems and ignition coils.

Designed as a direct replacement, this spark plug installs without modification and is suitable for routine servicing, diagnostics, or replacement of individual worn plugs while maintaining full OE integrity.

The spark plug generates a precisely timed electrical spark inside the combustion chamber to ignite the air-fuel mixture. This controlled ignition initiates combustion, allowing the engine to produce power efficiently and smoothly.

Function:
Produces a consistent ignition spark for efficient combustion
 Supports smooth idle, responsive acceleration, and stable power output
 Helps maintain fuel efficiency and emission control
 Engineered to Porsche’s exact OE heat range and performance standards
 Designed for durability under high thermal and mechanical loads

Spark plugs naturally wear due to heat, combustion pressure, and electrical stress. A worn or incorrect spark plug can cause misfires, rough running, reduced power, increased fuel consumption, and higher emissions. Replacing worn plugs with a genuine Porsche OE spark plug ensures the ignition system continues to perform exactly as engineered, protecting engine performance, efficiency, and longevity.

When to replace:
  Engine misfires or uneven idle
  Reduced throttle response or loss of power
  Increased fuel consumption
  At Porsche-recommended service intervals
•  During routine engine servicing or ignition maintenance

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99917015690
99917015690
92809460203
99917014190
99917015890
99917018990
9991701899A

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Special Offer
99917015690/1
Product Information
Product Information
Spark plug WR 7 DC+
Price is for each.

bosch

Fits:
Porsche 911 3.2L WITH CATALYST 1984-89
Porsche 924S 2.5L 1986-88
Porsche 928S / 928S2 / 928S4 / 928GT 1983-1991
Porsche 928 GTS 1992-95 (M28.49/50)
Porsche 944 / 944S / 944S2 / 944T 1985-91
Porsche 968 1992-95 (M44.43/44)
Porsche 912E



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99917015690
99917015690
0242235663
92809460203
99917014190
99917015890
99917018990
9991701899A

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Special Offer
99917015690/3
Product Information
Product Information
Spark plug WR 7 DC+
The spark plug produces a precisely timed electrical spark to ignite the air-fuel mixture within the combustion chamber. This ignition process enables smooth engine operation, efficient fuel burn, and reliable power output.
Sold individually,  4, 6 or 8 required depending on engine type

Fits:
Porsche 911 3.2L  1984 - 89 *with catalyst
Porsche 924S 2.5L 1986 - 1988
Porsche 928S / 928S2 / 928S4 / 928GT 1983 - 1991
Porsche 944 / 944S / 944S2 / 944T 1985 - 1991
Porsche 912E
Porsche 968 1992 - 1995 Coupe

Spark plugs play a critical role in engine efficiency, smoothness, and power delivery. Over time, wear from heat and combustion stress can reduce spark quality, leading to misfires, hesitation, and increased fuel consumption. Replacing worn plugs with an OE Match unit restores proper ignition timing and helps maintain optimal engine performance.

Designed for direct installation with no modification required, this spark plug is suitable for routine servicing, diagnostics, or replacement of individual worn plugs.

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

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99917015690
99917015690
92809460203
99917014190
99917015890
99917018990
9991701899A

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99917016290/3::1
Product Information
Product Information
Spark plug 5722.
6 Required per engine. Price is for each.

ngk

Fits:
Porsche 911 2.7L / 3.0L SC 1974-83
Porsche 911 2.7L 1974-75 Carrera
Porsche 911 3.0L 1976-77 Carrera

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99917016290
99917016290
0242255502

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99917016290
Product Information
Product Information
Spark plug W3CC.
6 Required per engine. Price is for each.

porsche

Fits:
Porsche 911 2.7L / 3.0L SC 1974-83
Porsche 911 2.7L 1974-75 Carrera
Porsche 911 3.0L 1976-77 Carrera

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99917016290
99917016290
0242255502

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Special Offer
99917015790/2
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Product Information
Spark plug WR4CC.
The spark plug produces a precisely timed electrical spark inside the combustion chamber to ignite the air-fuel mixture. This process enables efficient combustion, smooth power delivery, and reliable engine performance.
Sold individually, 6 Required per engine.

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

Spark plugs are critical to engine efficiency, power delivery, and smooth running. Over time, heat and combustion stress can reduce spark quality, leading to misfires, hesitation, and increased fuel consumption. Replacing a worn plug with this OE Match unit helps restore proper ignition timing and reliable combustion performance.
Designed as a direct replacement, this spark plug installs easily with no modification required, making it ideal for routine servicing or replacement of individual plugs.

Function:
•  Generates a consistent ignition spark for proper combustion
•  Supports smooth idle and responsive throttle response
•  Helps maintain fuel efficiency and stable engine operation
•  Direct-fit replacement for straightforward installation

A worn or degraded spark plug can cause rough running, misfires, loss of power, and poor 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
  Reduced throttle response or hesitation Increased fuel consumption
  At manufacturer-recommended service intervals
  During routine tune-ups or ignition system servicing

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

99917015790
99917015790
WR4CC

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Special Order item
99917015790
Product Information
Product Information
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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99917015790
99917015790
2411

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99917015790/1
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Product Information
Spark plug, WR4CC
This NGK spark plug (single unit) is a high-quality ignition component designed specifically for the Porsche 911 3.2-litre Carrera (1984–1989) without catalytic converter. Ideal for replacing an individual plug or purchasing multiples for a full engine service, this spark plug is manufactured to meet OEM specifications for non-catalyst air-cooled flat-six engines.
Sold individually, 6 Required per engine.

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

Spark plugs are responsible for igniting the air-fuel mixture inside the combustion chamber. Correct specification is essential on non-catalyst engines to ensure stable combustion, strong throttle response, and efficient engine operation. A worn or incorrect spark plug can cause misfires, rough idle, reduced power, and increased fuel consumption.

 • Creates a controlled spark to ignite the air-fuel mixture
 • Supports smooth engine running and stable combustion
 • Helps maintain power delivery and fuel efficiency

Key Functions & Benefits:
  Genuine NGK manufacture
  Supplied as one spark plug (order quantity as required)
  Correct specification for non-catalyst 3.2 Carrera
  OEM-quality materials and construction
  Reliable ignition performance and long service life

Spark plugs are critical to proper combustion, directly affecting engine performance, fuel efficiency, and reliability. Worn or incorrect spark plugs can cause misfires, rough running, poor throttle response, and increased fuel consumption. Regular replacement helps maintain smooth operation and protects key engine components from unnecessary stress.

 When spark plugs should be replaced:
  During scheduled servicing intervals
  If the engine shows signs of misfiring or rough idle
  When experiencing poor cold starting
  If fuel consumption increases unexpectedly
  After long-term storage or inactivity
  When plugs show visible wear, fouling, or corrosion

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

99917015790
99917015790
2411

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DISPLAYING 17 to 32 (of 38 products)
1 2 3
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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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