Your Vehicle
Porsche // 964 (911) (1989-1994) // 964 (911) TURBO 3.6L 1991-93
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IRIDIUM RACING Spark Plugs
- 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
Genuine Porsche spark plug connector this connector is for cylinder 3 on the exhaust side; it is a spark plug connector.
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
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref no 26
What This Product Does
This connector forms the connection between an ignition lead and its spark plug. It is an ignition connection component, rather than the spark plug itself or a complete ignition lead set.
Functions
- Connects the ignition lead to the spark plug terminal.
- Provides the plug-end connection within the ignition circuit.
- Allows renewal of the connector when inspection identifies deterioration.
Technical Details
- Porsche part number: 91160231300.
- Porsche identification: cylinder 3, exhaust-side spark plug connector.
Symptoms of Fault
- Misfiring or an uneven idle.
- Hesitation, particularly under engine load.
- Ignition problems that become more noticeable in damp conditions.
- Cracked insulation, loose connections or corroded terminals.
- Tracking marks indicating electrical leakage.
Why Replacement Matters
A deteriorated connector can interrupt the ignition connection or allow electrical leakage. Replace it when inspection confirms damage, corrosion or poor contact, rather than assuming that a misfire identifies this component alone. Check the associated lead and spark plug during diagnosis, as faults elsewhere in the ignition system can produce similar symptoms.
FAQs
Is this a spark plug or a complete lead set?
No. Part 91160231300 is the spark plug connector.
Should replacement be based only on a misfire?
No. Inspect the connector, lead and plug, and confirm the fault before replacing components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160231300
The product you are viewing cross references to these numbers
Porsche Iridium Racing Spark Plugs - Motorsport-Grade Ignition Performance
Iridium Racing Spark Plugs are engineered for extreme performance environments where ignition precision, heat resistance, and consistency are critical. Designed for high-RPM, high-compression, and motorsport-focused Porsche engines, these spark plugs deliver a powerful, stable spark under the most demanding conditions.
Available from Design911, Porsche Iridium Racing spark plugs are manufactured using advanced iridium electrode technology to ensure reliable combustion at sustained high engine loads—making them ideal for track, race, and heavily tuned applications.
What Do Iridium Racing Spark Plugs Do?
Iridium Racing spark plugs provide precise and reliable ignition under extreme engine conditions.
Core Functions:
- Deliver a strong, stable spark at high RPM.
- Support efficient combustion in high-compression engines.
- Resist heat-related breakdown during track use.
- Reduce misfires under sustained load.
- Maintain consistent ignition timing and performance.
High-quality ignition is essential for safe, high-performance engine operation.
Why Do Standard Spark Plugs Fail?
Standard spark plugs are not designed for prolonged
high-load or motorsport use. Common failure causes include:
- Electrode erosion at high temperatures.
- Spark blowout under high compression or boost.
- Heat range mismatch for tuned engines.
- Carbon fouling during aggressive driving.
- Reduced ignition stability at high RPM.
These failures can result in misfires, power loss, and increased engine stress during performance driving.
Why Upgrade to Iridium Racing Spark Plugs?
Iridium Racing plugs are purpose-built to exceed the limits of conventional spark plugs.
Upgrade Benefits:
- Ultra-fine iridium electrodes for precise ignition.
- Exceptional resistance to heat and wear.
- Stable spark delivery at extreme RPM and load.
- Optimised for motorsport and high-output engines.
- Improved reliability during track and race use.
Upgrading ensures dependable ignition performance in demanding driving conditions.
Highlights
- Porsche Iridium Racing spark plug upgrades
- Motorsport-grade ignition performance
- Designed for high-RPM and high-compression engines
- Superior heat resistance and durability
- Ideal for track, race, and tuned applications