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DENSO Iridium Power Spark Plug for Porsche 911/930 - 99917012890

DENSO Iridium Power Spark Plug for Porsche 911/930 - 99917012890

DENSO
Disponibilidad:
Agotado
SKU 5316
Agotado
$5.49 - $5.49
$5.49
$5.49 - $5.49
$5.49
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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The DENSO Iridium Power Spark Plug (99917012890) is an OEM-grade replacement for select Porsche 911, 930, and Carrera models. Its fine iridium center electrode delivers a focused spark for improved fuel efficiency and throttle response, while the tapered-cut U-groove ground electrode enhances ignitability. Pre-gapped to 0.7mm, this plug offers a long service life and consistent performance over stock copper plugs.

Key Features & Benefits

  • Iridium Center Electrode: Provides superior durability and a sharper spark for better combustion.
  • Tapercut & U-Groove Ground Electrode: Enhances flame kernel growth and reduces misfires.
  • Pre-Gapped to 0.7mm: Eliminates the need for gap adjustment during installation.
  • OEM Replacement: Directly replaces Porsche part number 99917012890.
  • Copper Core: Excellent heat transfer and fouling resistance.

Vehicle Fitment

Make Model Years Engine
Porsche 911 1986–1989 3.3H6
Porsche 930 1978–1979 3.3H6
Porsche 911 1976–1977 3.0H6
Porsche 911 1974–1975 2.7H6
Porsche 911 1970 2.2H6
Porsche 911 1965–1967 2.0H6
Porsche Carrera 1960–1964 2.0H4

Technical Specifications

Part Number 99917012890
Manufacturer Heat Range 24
Pre-Gap Size 0.7mm
Thread Diameter 14.00mm
Reach 19.00mm
Hex Size 20.6mm
Seat Type Flat
Resistance 5000 ohm

Installation Notes

Pre-gapped and ready to install; professional installation recommended for accurate torque and clearance.

About DENSO

DENSO is a globally trusted automotive component manufacturer known for high-quality ignition and electrical parts.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 7 applications
911 Classic
Make Model Engine Years
Porsche 911 2.0H6 1965–1967
911 G-Series
Make Model Engine Years
Porsche 911 3.0H6 1976–1977
Porsche 911 2.7H6 1974–1975
911 3.2
Make Model Engine Years
Porsche 911 3.3H6 1986–1989
930 Turbo
Make Model Engine Years
Porsche 930 3.3H6 1978–1979
356 Carrera
Make Model Engine Years
Porsche Carrera 2.0H4 1960–1964
Fits 7 vehicle applications Check vehicle fitment before ordering View fitment

About this Spark Plug

The DENSO 5316 spark plug ignites the air and fuel in each cylinder. Worn plugs make the ignition system work harder and can cause misfires, rough running and higher fuel consumption.

Frequently asked questions

How often should I replace spark plugs?

Follow the interval in your car's maintenance schedule. Turbocharged engines and tuned engines often need plugs replaced sooner than naturally aspirated ones.

What are the signs of worn spark plugs?

Misfires or a check-engine light, rough idle, hesitation under acceleration, harder starting, and reduced fuel economy.

Do I need to gap new spark plugs?

Many modern plugs come pre-gapped and some iridium or platinum plugs should not be adjusted. Check the gap against your car's specification and only adjust it carefully if the plug maker allows it.

Can I replace spark plugs myself?

On most engines, yes. Work on a cold engine, blow debris out of the plug wells before removing plugs, thread new plugs in by hand first, and tighten to the specified torque.

How do I make sure this spark plug fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

Euromotiv is an independent retailer of OEM, Genuine, and aftermarket automotive parts. We are not affiliated with, endorsed by, or authorized by Audi AG, Volkswagen AG, BMW AG, Mercedes-Benz Group AG, Dr. Ing. h.c. F. Porsche AG, MINI, or any other vehicle manufacturer. All trademarks, logos, and brand names are the property of their respective owners and are used solely for identification and compatibility purposes.