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Spark Plugs

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DISPLAYING 1 to 13 (of 13 products)
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



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99917018390
99917018390
99917018290
0242245539

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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Related, superseded, cross reference or alternative numbers for comparison.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
99917019590/1x6
Product Information
Product Information
Spark Plugs,14FR6LDU.
PACK OF 6

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L / 3.8L 1991 - 1993
Porsche 964 TURBO 3.3L / 3.6L 1991 - 1993

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS 1994- 1997
Porsche 993 Turbo / Turbo S 1994 - 1997
Porsche 993 GT2 1994 - 1997

Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKI 1999 - 2002
Porsche 996 GT3 MKII 2003>>

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99917019590
99917019590
99917019290
99917018390

The product you are viewing cross references to these numbers
99917019590/2x6
Product Information
Product Information
Spark Plugs,14FR6LDU.
PACK OF 6

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L / 3.8L 1991 - 1993
Porsche 964 TURBO 3.3L / 3.6L 1991 - 1993

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS 1994- 1997
Porsche 993 Turbo / Turbo S 1994 - 1997
Porsche 993 GT2 1994 - 1997

Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKI 1999 - 2002
Porsche 996 GT3 MKII 2003>>

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99917019590
99917019590
99917019290
99917018390

The product you are viewing cross references to these numbers
99917019590/5x6
Product Information
Product Information
Spark plugs, 14FR6LDU.
The spark plug restores reliable ignition performance and balanced combustion across all cylinders, ensuring fit and function comparable to the original parts. Supplied as a complete kit, it is designed for complete replacement in compatible six-cylinder Porsche engines.
PACK OF 6

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L / 3.8L 1991 - 1993
Porsche 964 TURBO 3.3L / 3.6L 1991 - 1993

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS 1994- 1997
Porsche 993 Turbo / Turbo S 1994 - 1997
Porsche 993 GT2 1994 - 1997

Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKI 1999 - 2002
Porsche 996 GT3 MKII 2003>>

This OE Match spark plug set includes six identical spark plugs, each manufactured to closely follow the original Porsche specification. Designed to deliver consistent ignition across all cylinders, the set helps restore smooth engine operation, stable idle, and reliable throttle response.

Replacing spark plugs as a complete set is essential for balanced combustion and even engine performance. Over time, spark plugs degrade due to heat and combustion stress, leading to misfires, poor fuel economy, and reduced performance. This OE Match pack of six provides a cost-effective solution for scheduled maintenance, tune-ups, and engine servicing while maintaining OE-equivalent performance.

Each plug installs directly with no modification required.

Function:
•  Provides reliable ignition for all six cylinders
  Maintains smooth idle and responsive acceleration
  Supports efficient fuel combustion and engine balance
  Supplied as a complete engine set for correct servicing

Worn spark plugs can cause misfires, rough running, increased fuel consumption, and uneven engine performance. Replacing all six plugs together ensures consistent ignition timing across cylinders, helping maintain engine efficiency, performance, and long-term reliability. Using an OE Match set ensures proper operation without compromising on fit or function.

When to replace:
 Rough or unstable idle
 Hesitation or lack of power under acceleration
 Poor fuel economy
 Misfire codes or engine warning signs
  At regular maintenance intervals or during tune-ups

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99917019590
99917019590
99917018390
99917019290

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Special Order item
99360231300
Product Information
Product Information
Spark plug connector. Sold each.

porsche

Fits:
Porsche 993 C2 / C4 / RS 1994-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 19

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99360231300
99360231300

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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

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99917018390
99917018390
99917018290
0242245539

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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, 14FR 6LDU.
Genuine Porsche original equipment (OE) ignition component. The spark plug provides a controlled electrical spark within the combustion chamber to ignite the air-fuel mixture. This ignition initiates combustion and enables the engine to produce power smoothly and efficiently across the RPM range.
Sold individually, 6 required per engine.

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L / 3.8L 1991 - 1993
Porsche 964 TURBO 3.3L / 3.6L 1991 - 1993

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS 1994- 1997
Porsche 993 Turbo / Turbo S 1994 - 1997
Porsche 993 GT2 1994 - 1997

Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKI 1999 - 2002
Porsche 996 GT3 MKII 2003>>

This spark plug meets the exact specifications used by Porsche on the assembly line and is fitted as standard on a range of Porsche models, ensuring precise ignition performance and long-term reliability.

Function:
•  Generates reliable ignition sparks for efficient combustion
•  Helps maintain consistent engine performance and power delivery
•  Supports smooth idle and throttle response

Spark plugs are a critical engine component that wear with use due to extreme heat, combustion pressures, and electrical stress. Worn plugs can lead to poor idle quality, misfires, reduced power, rough starts, and increased fuel consumption. Installing a genuine OE Porsche spark plug ensures the ignition system functions exactly as designed and helps preserve engine health, efficiency, and performance.

When to replace:
  Rough or unstable engine idle
  Misfires or engine hesitation
  Increased fuel consumption
  After reaching the manufacturer’s recommended service interval
  During tune-up or ignition system servicing

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

99917019590
99917019590
99917018390
99917019290

The product you are viewing cross references to these numbers
Special Offer
99917019590/1
Product Information
Product Information
Spark plug, 14FR 6LDU.
The spark plug delivers the electrical spark that ignites the air-fuel mixture in the combustion chamber. Reliable ignition is crucial for smooth engine operation, efficient fuel consumption, and optimal power delivery.
Sold individually, 6 required per engine.

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L / 3.8L 1991 - 1993
Porsche 964 TURBO 3.3L / 3.6L 1991 - 1993

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS 1994- 1997
Porsche 993 Turbo / Turbo S 1994 - 1997
Porsche 993 GT2 1994 - 1997

Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKI 1999 - 2002
Porsche 996 GT3 MKII 2003>>

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

99917019590
99917019590
0242240566
99917019290
99917018390

The product you are viewing cross references to these numbers
Special Offer
99917019590/2
Product Information
Product Information
Spark plug, 14FR 6LDU.
The spark plug delivers the electrical spark that ignites the air-fuel mixture in the combustion chamber. Reliable ignition is crucial for smooth engine operation, efficient fuel consumption, and optimal power delivery.
Sold individually, 6 required per engine.

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L / 3.8L 1991 - 1993
Porsche 964 TURBO 3.3L / 3.6L 1991 - 1993

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS 1994- 1997
Porsche 993 Turbo / Turbo S 1994 - 1997
Porsche 993 GT2 1994 - 1997

Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKI 1999 - 2002
Porsche 996 GT3 MKII 2003>>

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

99917019590
99917019590
99917018390
99917019290

The product you are viewing cross references to these numbers
Special Offer
99917019590/3
Product Information
Product Information
Spark plug, 14FR 6LDU.
The spark plug generates a controlled electrical spark inside the combustion chamber, igniting the air-fuel mixture. This essential action supports smooth engine starts, balanced combustion, efficient fuel usage, and stable power output.
Sold individually, 6 required per engine.

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L / 3.8L 1991 - 1993
Porsche 964 TURBO 3.3L / 3.6L 1991 - 1993

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS 1994- 1997
Porsche 993 Turbo / Turbo S 1994 - 1997
Porsche 993 GT2 1994 - 1997

Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKI 1999 - 2002
Porsche 996 GT3 MKII 2003>>


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

99917019590
99917019590
14FR6LDU
99917019290
99917018390

The product you are viewing cross references to these numbers
Special Offer
99917019590/5
Product Information
Product Information
Spark plug 14FR6LDU.
This OE Match spark plug restores proper ignition timing and efficient combustion, helping the engine run smoothly and respond confidently to throttle inputs. Designed for direct installation without modification, it’s ideal for regular servicing, tune-ups, and maintenance.
Sold individually, 6 required per engine.

Fits:
Porsche 964 C2 / C4 1989 - 1993
Porsche 964 RS 3.6L / 3.8L 1991 - 1993
Porsche 964 TURBO 3.3L / 3.6L 1991 - 1993

Porsche 993 C2 / C4 1994 - 1997
Porsche 993 C2S / C4S 1994 - 1997
Porsche 993 RS 1994- 1997
Porsche 993 Turbo / Turbo S 1994 - 1997
Porsche 993 GT2 1994 - 1997

Porsche 996 TURBO 2000 - 2005
Porsche 996 GT2 2001 - 2005
Porsche 996 GT3 MKI 1999 - 2002
Porsche 996 GT3 MKII 2003>>

OE Match spark plug for Porsche - direct replacement for part 99917019590, engineered to deliver reliable ignition performance, consistent combustion, and proper fuel burn with OE-equivalent fit and function.

The spark plug provides a controlled electrical spark inside the combustion chamber to ignite the air-fuel mixture. This ignition process is essential for engine power, efficiency, and smooth running.

Function:
•  Produces the ignition spark for combustion
  Supports smooth idle and throttle response
  Helps maintain proper engine efficiency and fuel burn
  Designed to match OE Porsche performance and heat range.

A deteriorated or worn spark plug can cause misfires, rough running, sluggish acceleration, and lower fuel efficiency. Replacing with an OE Match spark plug ensures ignition performance that closely mirrors the original specification, helping maintain engine health and reliable operation.

When to replace:
 Rough or unstable idle
 Hesitation or lack of power under acceleration
 Poor fuel economy
 Misfire codes or engine warning signs
  At regular maintenance intervals or during tune-ups

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

99917019590
99917019590
99917018390
99917019290

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DISPLAYING 1 to 13 (of 13 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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