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Porsche > 997 (911) MK1 2005-2008 > 997 MK1 TURBO 2007-09 > Service Parts >

Spark Plugs

Spark Plugs

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DISPLAYING 1 to 4 (of 15 products)
1 2 3 4
Ignition Coil Packs (PACK OF 6). Porsche 996 / Boxster 986 / Boxster 987 / 996 GT3 MKII - 99760210400, 99760210402, 99660210400, 99760210404, 99760210400, 99760210405, 997.602.104.05, 997 602 104 05, 997.602.104.04, 997 602 104 04, 997.602.104.02, 997 602 104 02, 99760210406, 997.602.104.06, 997 602 104 06, 99760210403, 997.602.104.03, 997 602 104 03, 99760210401, 997.602.104.01, 997 602 104 01, 997.602.104.00, 997 602 104 00, 996.602.104.00, 996 602 104 00, 99760210700, 997.602.107.00, 997 602 107 00, 99660210101, 996.602.101.01, 996 602 101 01, 99660210501, 996.602.105.01, 996 602 105 01, 99660210500, 996.602.105.00, 996 602 105 00, 9760210702, 90038502501, 900.385.025.01, 900 385 025 01, 99660210100, 996.602.101.00, 996 602 101 00, 99917022390, 99610532552 - ZS178, ZS178, 0986221119
1
Ignition Coil Packs (PACK OF 6). Porsche 996 / Boxster 986 / Boxster 987 / 996 GT3 MKII
99760210405/1.1KIT
Product Information
Product Information
Ignition Coils Packs (PACK OF 6). New longer bolts
Porsche 996 / Boxster 986 / Boxster 987 / 996 GT3 MKII

beru

same as 99760210404/1
PACK OF 6

Fits:
Porsche 996 3.6L Inc C2 / C4 / C4S
Porsche 986 Boxster 2.7L / 3.2L 3.4L 2003>>
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987 Boxster 2.7L / 3.2L
Porsche 987C Cayman 2.7L / 3.4L
Porsche 997 3.6L, 3.8L / 997 GT3

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Related, superseded, cross reference or alternative numbers for comparison.

99760210405
99760210400
99760210402
99660210400
99760210404
99760210400
99760210405
997.602.104.05
997 602 104 05
997.602.104.04
997 602 104 04
997.602.104.02
997 602 104 02
99760210406
997.602.104.06
997 602 104 06
99760210403
997.602.104.03
997 602 104 03
99760210401
997.602.104.01
997 602 104 01
997.602.104.00
997 602 104 00
996.602.104.00
996 602 104 00
99760210700
997.602.107.00
997 602 107 00
99660210101
996.602.101.01
996 602 101 01
99660210501
996.602.105.01
996 602 105 01
99660210500
996.602.105.00
996 602 105 00
9760210702
90038502501
900.385.025.01
900 385 025 01
99660210100
996.602.101.00
996 602 101 00
99917022390
99610532552

The product you are viewing cross references to these numbers
Ignition coils packs (PACK OF 6). Porsche 996 / Boxster 986 / Boxster 987 / 996 GT3 MKII - 99760210400, 99760210402, 99660210400, 99760210404, 99760210400, 0986221119 - ZS178, ZS178
1
Ignition coils packs (PACK OF 6). Porsche 996 / Boxster 986 / Boxster 987 / 996 GT3 MKII
99760210405/3KIT
Product Information
Product Information
Ignition coil. 6 Required per engine. SET OF 6
The 99760210405 is the individual coil module used on the Porsche M96 and M97 M-series engines in many 986/996/987/early 997 cars. Normally should be replaced as a set of six coils (one per cylinder) 


Why these coils should be replaced 

Age / thermal breakdown: coils are exposed to heat cycles and can develop internal insulation breakdown or hairline cracks in the housing. Over time this causes weak or leaking high voltage and intermittent sparks. 

 Misfire symptoms: a failing coil will cause single-cylinder misfires (P030x codes), rough idle, reduced power, increased fuel consumption and catalytic converter heating/damage if left. These are the most common reasons owners replace coils. 

Carbon tracking / cracking: visible cracks or carbon tracking on the coil boot can provide a leakage path for spark, reducing performance and causing intermittent faults. 

Connector / wiring issues: corroded or loose coil connectors can mimic coil failures; inspect connectors when replacing coils.  


Fits:
Porsche 996 3.6L Inc C2 / C4 / C4S
Porsche 986 Boxster 2.7L / 3.2L 2003>>
Porsche 996 GT3 MKI
Porsche 996 GT3 MKII
Porsche 996 Turbo
Porsche 987 Boxster 2.7L / 3.2L
Porsche 987C Cayman 2.7L / 3.4L
Porsche 997 3.6L, 3.8L / 997 GT3

Does not come with securing bolts.
2 required per coil, please order separately (part number 90006708901).

Common issues reported in practice 

One or more cylinders misfire when the engine is hot but behave quite normally when cold (typical of internal coil failure or heat-sensitive cracks). Cracked coil housings on Boxster/996 cars, owners often replace the entire set for reliability. After a spark plug change, misfires appear because weakened coils can fail once higher-voltage plugs are installed; this is a frequently reported pattern.


How to diagnose (practical steps)

Read codes: P0300 / P0301–P0306 point to misfires; note which cylinder is affected.Swap test: swap the suspected coil with another cylinder’s coil — if the misfire follows the coil, the coil is bad. (Common, quick field test used by owners.)Measure resistance: check primary and secondary coil resistances at ~20°C and compare to the ranges above.Visual inspection: look for cracks, carbon tracking, oil ingress, or damaged boots/connectors.Oscilloscope / HV probe: for deeper diagnosis a scope or HV probe can show spark energy, but most DIY diagnostics use swap + resistance checks. 



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

99760210405
99760210400
99760210402
99660210400
99760210404
99760210400
0986221119

The product you are viewing cross references to these numbers
Performance Ignition Coil Pack (PACK OF 6). Porsche 996 / Boxster 986 / Boxster 987 / 997 / Cayman - 99760210402, 99760210400, 99660210400, 99760210404, 0986221119, 90660210200, 90660210301, 99660210100, 99660210101, 99660210200, 99760210401, 99760210700, 99760210702, 99760210406, 99760210405, 90660210101, 99760210703, 4201R - EUPD6004202R
1
Performance Ignition Coil Pack (PACK OF 6). Porsche 996 / Boxster 986 / Boxster 987 / 997 / Cayman
4201Rx6
Product Information
Product Information
Performance Ignition Coil Pack.  6 Required per engine. PACK OF 6.


Fits:
Porsche 911 (996)
Porsche 911 (997)
Porsche Boxster
Porsche Cayman

The Plasma Direct is an ignition coil with a built-in high-power amplifier. Plasma Direct Coils produce 4 times more spark energy than stock coils, and generate an ultra-fast multi-spark-discharge of 10 sparks up to highest RPM.

The spark amperage is increased by 100%, allowing the spark to reach many more molecules, which therefore accelerates the ignition and combustion processes. This is extremely important in forced induction applications, but also improves the performance of normally aspirated engines.
The Plasma Direct will increase horsepower and torque throughout the entire RPM range, as well as reducing fuel consumption. Even engines with legendary smoothness will be further refined with the Plasma Direct upgrade. Plasma Direct coils are OBD II compliant.

- 100% secondary current (Spark Amperage) increase.
- 4 times spark energy increase for the initial spark discharge.
- 8% Fuel Saving
- Easy installation.
- Compatible with all OEM components.
- Compatible with OBD-II (On-Board-Diagnostics).



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

4201Rx6
99760210402
99760210400
99660210400
99760210404
0986221119
90660210200
90660210301
99660210100
99660210101
99660210200
99760210401
99760210700
99760210702
99760210406
99760210405
90660210101
99760210703
4201R

The product you are viewing cross references to these numbers
Spark plugs (PACK OF 6), Double-iridium. Porsche 997 Turbo and GT2 - 99917010390 - FR6DPP332, Z185, Z185
3
Spark plugs (PACK OF 6), Double-iridium. Porsche 997 Turbo and GT2
99917010390/3x6
Product Information
Product Information
Spark plug, FR6 DPP332 / Z185, Double-iridium
OE Match double-iridium spark plug set (pack of 6) designed as a direct replacement for Porsche factory spark plugs. Supplied as a complete set of six, it is specifically intended for the high-performance engines found in the Porsche 997 Turbo and 997 GT2.
PACK OF 6

Fits:
Porsche 997 Turbo 3.6L 2007 - 2009 (M97.70)
Porsche 997 GT2 2007 - 2009 (M97.70)
Porsche 997.2 GT2 RS 2011 - 2013

This OE Match double-iridium spark plug set contains six identical spark plugs, each manufactured to OE-equivalent standards for thread dimensions, electrode geometry, and thermal characteristics. Featuring iridium on both the centre and ground electrodes, these plugs provide a finer, more stable spark and significantly improved resistance to wear compared to conventional spark plugs.

Turbocharged Porsche engines operate under extreme heat and pressure, making ignition quality critical. This OE Match set supports stable combustion, smooth idle, sharp throttle response, and efficient fuel burn under boost. Replacing all six spark plugs together ensures balanced ignition across cylinders and consistent power delivery throughout the rev range.

Designed as direct replacements, these spark plugs install without modification and are ideal for routine servicing, tune-ups, or ignition system maintenance on Porsche 997 Turbo and GT2 models.

Each spark plug generates a precisely timed electrical spark to ignite the air-fuel mixture in its cylinder. As a complete set, they ensure uniform combustion across all six cylinders, supporting smooth engine operation and reliable turbocharged performance.

Function:
•  Provides reliable ignition for all six cylinders
•  Double-iridium electrodes improve spark stability and service life
•  Supports smooth idle and responsive acceleration
•  Helps maintain power delivery and fuel efficiency under boost

Spark plugs in high-performance turbocharged engines are exposed to extreme temperatures and pressures. Worn or degraded plugs can lead to misfires, hesitation under boost, reduced power, and increased fuel consumption. Replacing all six plugs with an OE Match double-iridium set restores reliable ignition, balanced combustion, and helps protect ignition coils and engine components.

When to replace:
•  Engine misfires or rough/uneven idle
•  Loss of throttle response or power under boost
•  Increased fuel consumption
•  At manufacturer-recommended service intervals
•  During routine ignition system servicing

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

99917010390
99917010390

The product you are viewing cross references to these numbers
DISPLAYING 1 to 4 (of 15 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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