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Spark Plugs

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DISPLAYING 1 to 16 (of 17 products)
1 2
91160231500KIT
Product Information
Product Information
Spark Plug Cap Kit.
Kit Includes: x6 Spark Plug Caps

Fits:
Porsche 911 1977>>1989
Porsche 930 Turbo 1977>>1989 
Porsche 964 3.3L Turbo 1991>>1992 

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Related, superseded, cross reference or alternative numbers for comparison.

91160231500KIT
91160231500
91160331100
91160930900
91160931100
91160931200

The product you are viewing cross references to these numbers
99917018390/1x12
Product Information
Product Information
Spark Plug FR5DTC.12 Per Engine.

 
ngk
PACK OF 12

Fits:
Porsche 964 C2/C4
Porsche 993 C2/C4 C2S/C4S
Porsche 964RS M64.03
Porsche 993RS M64.20



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Related, superseded, cross reference or alternative numbers for comparison.

99917018390
99917018390
99917018290
0242245539

The product you are viewing cross references to these numbers
99917018390/1x6
Product Information
Product Information
Spark Plug FR5DTC.12 Per Engine.

 
ngk
PACK OF 6

Fits:
Porsche 964 C2/C4
Porsche 993 C2/C4 C2S/C4S
Porsche 964RS M64.03
Porsche 993RS M64.20



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Related, superseded, cross reference or alternative numbers for comparison.

99917018390
99917018390
99917018290
0242245539

The product you are viewing cross references to these numbers
9991700IW24x6
Product Information
Product Information
Spark Plugs (PACK OF 6). Porsche 965 3.3L Turbo

denso

Ultra Fine Electrode

By harnessing the power of Iridium, DENSO is suddenly able to shrink the surface area of the center electrode - the critical component of a spark plug. Unlike a typical platinum plug that has a 1.1mm diameter center electrode, DENSO Iridium Power plugs have the world's smallest center electrode measuring 0.4mm in diameter. This means that the voltage requirements are decreased while firing performance is greatly improved.

PACK OF 6

Fits:
Porsche 965 3.3L Turbo (M30.69)

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Related, superseded, cross reference or alternative numbers for comparison.

9991700IW24x6
99917018690
9991700IW24

The product you are viewing cross references to these numbers
99917019590/1x6
Product Information
Product Information
Spark Plugs (PACK OF 6). Porsche 965 Turbo / 993 Turbo / 996 Turbo / 996 GT2 / 996 GT3
Spark Plug 14FR6LDU.

bosch
PACK OF 6

Fits:

Porsche 964 (911) C2 1989-93
Porsche 964 (911) C4 1989-93
Porsche 964 (911) RS 3.6L 1991-93
Porsche 964 (911) RS 3.8L 1991-93
Porsche 964 (911) TURBO 3.3L 1991-93
Porsche 964 (911) TURBO 3.6L 1991-93
Porsche 993 (911) C2 1994-97
Porsche 993 (911) C4 1994-97
Porsche 993 (911) RS 1994-97
Porsche 993 (911) C2S 1994-97
Porsche 993 (911) C4S 1994-97
Porsche 993 (911) TURBO 1994-96
Porsche 993 (911) GT2 1994-97
Porsche 993 (911) TURBO S 1994-97
Porsche 996 TURBO 2000-05
Porsche 996 GT2 2001-05
Porsche 996 GT3 MKI 1999-02
Porsche 996 GT3 MKII 2003>>



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

99917019590
99917019590
99917018390

The product you are viewing cross references to these numbers
99917019590/2x6
Product Information
Product Information
Spark Plugs (PACK OF 6). Porsche 965 Turbo / 993 Turbo / 996 Turbo / 996 GT2 / 996 GT3
Spark Plug 14FR6LDU.

beru
PACK OF 6

Fits:

Porsche 964 (911) C2 1989-93

Porsche 964 (911) C4 1989-93

Porsche 964 (911) RS 3.6L 1991-93

Porsche 964 (911) RS 3.8L 1991-93

Porsche 964 (911) TURBO 3.3L 1991-93

Porsche 964 (911) TURBO 3.6L 1991-93

Porsche 993 (911) C2 1994-97

Porsche 993 (911) C4 1994-97

Porsche 993 (911) RS 1994-97

Porsche 993 (911) C2S 1994-97

Porsche 993 (911) C4S 1994-97

Porsche 993 (911) TURBO 1994-96

Porsche 993 (911) GT2 1994-97

Porsche 993 (911) TURBO S 1994-97

Porsche 996 TURBO 2000-05

Porsche 996 GT2 2001-05

Porsche 996 GT3 MKI 1999-02

Porsche 996 GT3 MKII 2003>>



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

99917019590
99917019590
99917018390

The product you are viewing cross references to these numbers
Special Offer
91160231500/1
Product Information
Product Information
Spark plug cap.
6 Required per engine. Price is for each.

beru

Fits:
Porsche 911 1977-89 (6 per model)
Porsche 930 Turbo 1977-89 (6 per model)
Porsche 964 3.3L Turbo 1991-92 (6 per model)

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

91160231500
91160231500
91160331100
91160930900
91160931100
91160931200

The product you are viewing cross references to these numbers
Special Order item
99917018390
Product Information
Product Information
Spark plug FR5DTC.
12 Required per engine. Price is for each.

porsche

Fits:
Porsche 964 C2/C4
Porsche 993 C2/C4 C2S/C4S
Porsche 964RS M64.03
Porsche 993RS M64.20

Related reference numbers
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99917018390
99917018390
99917018290
0242245539

The product you are viewing cross references to these numbers
Special Order item
99957105402
Product Information
Product Information
Spark plug tool.

porsche

Fits:
Porsche 964 C2 / C4 / RS 1989-94

To be used with 99957105202 spark plug tool key.

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

99957105402
99957105202

The product you are viewing cross references to these numbers
Special Order item
99957105202
Product Information
Product Information
Spark plug tool key. 

porsche

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

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

99957105202
99957105202

The product you are viewing cross references to these numbers
Special Order item
477012203A
Product Information
Product Information
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

Related reference numbers
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477012203A
477012203A

The product you are viewing cross references to these numbers
Special Order item
99917018690
Product Information
Product Information
Spark plug WR4DPO.
6 Required per engine. Price is for each.

porsche

Fits:
Porsche 911 T (1969 to 1973),
Porsche 914-6 (1970 and 1971)
Porsche 964 Turbo 3.3l (1991 and 1992)
Porsche 965 3.3L Turbo (M30.69)

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

99917018690
0242250512
99917018690

The product you are viewing cross references to these numbers
Special Offer
99917018390/1
Product Information
Product Information
Spark Plug 
12 Required per engine. Price is for each.

ngk

Fits:
Porsche 964 C2/C4
Porsche 993 C2/C4 C2S/C4S
Porsche 964RS M64.03
Porsche 993RS M64.20

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

99917018390
99917018390
99917018290
0242245539

The product you are viewing cross references to these numbers
Special Order item
99917019590
Product Information
Product Information
Spark plug 14FR6LDU.
Price is for each.

porsche

Fits:

Porsche 964 (911) C2 1989-93

Porsche 964 (911) C4 1989-93

Porsche 964 (911) RS 3.6L 1991-93

Porsche 964 (911) RS 3.8L 1991-93

Porsche 964 (911) TURBO 3.3L 1991-93

Porsche 964 (911) TURBO 3.6L 1991-93

Porsche 993 (911) C2 1994-97

Porsche 993 (911) C4 1994-97

Porsche 993 (911) RS 1994-97

Porsche 993 (911) C2S 1994-97

Porsche 993 (911) C4S 1994-97

Porsche 993 (911) TURBO 1994-96

Porsche 993 (911) GT2 1994-97

Porsche 993 (911) TURBO S 1994-97

Porsche 996 TURBO 2000-05

Porsche 996 GT2 2001-05

Porsche 996 GT3 MKI 1999-02

Porsche 996 GT3 MKII 2003>>



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

99917019590
99917019590
99917018390

The product you are viewing cross references to these numbers
Special Offer
99917019590/1
Product Information
Product Information
Spark plug, 14FR 6LDU.
Price is for each.

bosch

Fits:

Porsche 964 (911) C2 1989-93

Porsche 964 (911) C4 1989-93

Porsche 964 (911) RS 3.6L 1991-93

Porsche 964 (911) RS 3.8L 1991-93

Porsche 964 (911) TURBO 3.3L 1991-93

Porsche 964 (911) TURBO 3.6L 1991-93

Porsche 993 (911) C2 1994-97

Porsche 993 (911) C4 1994-97

Porsche 993 (911) RS 1994-97

Porsche 993 (911) C2S 1994-97

Porsche 993 (911) C4S 1994-97

Porsche 993 (911) TURBO 1994-96

Porsche 993 (911) GT2 1994-97

Porsche 993 (911) TURBO S 1994-97

Porsche 996 TURBO 2000-05

Porsche 996 GT2 2001-05

Porsche 996 GT3 MKI 1999-02

Porsche 996 GT3 MKII 2003>>



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

99917019590
99917019590
0242240566
99917018390

The product you are viewing cross references to these numbers
Special Offer
99917019590/2
Product Information
Product Information
Spark plug 14FR6LDU.
Price is for each.

beru

Fits:

Porsche 964 (911) C2 1989-93

Porsche 964 (911) C4 1989-93

Porsche 964 (911) RS 3.6L 1991-93

Porsche 964 (911) RS 3.8L 1991-93

Porsche 964 (911) TURBO 3.3L 1991-93

Porsche 964 (911) TURBO 3.6L 1991-93

Porsche 993 (911) C2 1994-97

Porsche 993 (911) C4 1994-97

Porsche 993 (911) RS 1994-97

Porsche 993 (911) C2S 1994-97

Porsche 993 (911) C4S 1994-97

Porsche 993 (911) TURBO 1994-96

Porsche 993 (911) GT2 1994-97

Porsche 993 (911) TURBO S 1994-97

Porsche 996 TURBO 2000-05

Porsche 996 GT2 2001-05

Porsche 996 GT3 MKI 1999-02

Porsche 996 GT3 MKII 2003>>



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

99917019590
99917019590
99917018390

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 17 products)
1 2
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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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