Ignition Coil Pack (Pack of 6). Porsche 997.1 turbo / GT 2  ❭  99760210405KIT

Ignition Coil Set

Restore the performance and reliability of your Porsche 997.1 Turbo or GT2 with this Genuine Porsche Ignition Coil Set, containing the correct factory combination of five standard ignition coils and one shorter-profile ignition coil

Fits:

• Porsche 997 MK1 TURBO 2007-09
• Porsche 997 MK1 GT2 2007-09

Manufactured to Porsche's original equipment specification, these genuine ignition coils deliver the precise ignition performance required by the legendary 3.6ltr Mezger twin-turbo engine, ensuring smooth power delivery, reliable cold starting and maximum engine efficiency.

Why Does the 997.1 turbo Use Two Different Ignition Coils?

Unlike most Porsche flat-six engines, the 997.1 turbocharged engine uses two different ignition coil part numbers. This is not because cylinder 6 requires a different spark output, but purely due to packaging constraints around the turbocharger assembly.

The factory configuration consists of:

• 5 × Genuine Porsche Ignition Coils – 99760210405
• 1 × Genuine Porsche Ignition Coil – 99760210406 (Cylinder 6 only)

Cylinder 6 sits extremely close to the Variable Turbine Geometry (VTG) turbo actuator and surrounding turbocharger hardware. There simply isn't enough clearance for the standard ignition coil, so Porsche designed a shorter-profile housing specifically for this location.

Importantly, both coils produce identical ignition energy and electrical performance. The only difference is the physical housing design, allowing the cylinder 6 coil to fit safely without interfering with the turbocharger components.

This is why this Porsche ignition coil kit for the 997.1 turbo / GT2 includes five standard coils and one shorter cylinder 6 coil.

Why Do Ignition Coils Fail?

Ignition coils operate in one of the harshest environments on the engine, exposed to continuous heat cycles, vibration and moisture. On the turbocharged Mezger engine, the proximity of the exhaust manifolds and turbochargers subjects the coils to even greater thermal stress.

Over time the epoxy resin and insulation within the coil can deteriorate, while the outer plastic housing may become brittle and develop hairline cracks. Moisture entering these cracks can cause the electrical spark to track to earth instead of the spark plug, resulting in inconsistent ignition performance.

Although a single failed coil can cause noticeable running issues, the remaining coils are usually of a similar age and condition. Replacing the complete set ensures balanced ignition performance across all six cylinders and reduces the likelihood of future failures.

Common Signs of Failing Ignition Coils

Typical symptoms include:

• Engine misfire
• Rough or unstable idle
• Hesitation under acceleration
• Reduced engine performance
• Poor throttle response
• Increased fuel consumption
• Illuminated Check Engine Light (CEL)
• Fault codes relating to cylinder misfires
• Difficult cold starting

If left unresolved, persistent misfires can increase exhaust emissions and place unnecessary strain on the catalytic converters and oxygen sensors.

Why Replace the Complete Set?

Replacing all six ignition coils together is considered best practice, particularly on higher mileage vehicles or whenever the spark plugs are being renewed.

Benefits include:

• Restores smooth idle and power delivery
• Reliable ignition under boost
• Reduced risk of future coil failures
• Improved fuel efficiency
• Consistent spark energy across all cylinders
• Helps protect catalytic converters from damage caused by misfires

Kit Contents

• 5 × Genuine Porsche Ignition Coils – 99760210405
• 1 × Genuine Porsche Ignition Coil – 99760210406 (Cylinder 6)       

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