Set of 8 iridium spark plugs NGK96220 SILZKGR8D7E for S8 SQ7 SQ8/Porsche Cayenne Panamera 4.0L V8

Set of 8 Iridium Spark Plugs NGK96220 SILZKGR8D7E for S8 SQ7 SQ8/Porsche Cayenne Panamera 4.0L V8

The ready-made service kit of automotive components is designed for scheduled maintenance and comprehensive replacement of ignition elements. The set is aimed at car owners and service station technicians servicing eight-cylinder German-made power units with twin turbocharging. Supplying parts as a single kit eliminates the need for individual selection and guarantees the identity of factory parameters, heat rating, and electrode gap in all engine cylinders. The architecture of each element includes a ceramic insulator with annular ribs to prevent current leakage and a metal threaded body made by cold stamping. The products are designed for extreme temperature conditions, high pressure inside combustion chambers, and intense vibration loads typical of sports modifications of passenger cars and heavy SUVs.

Ignition Efficiency and Fuel Economy

The introduction of precious metals into the design of the working electrodes has made it possible to achieve stable formation of the spark channel at reduced on-board network voltage. The ultra-thin tip of the central electrode reduces the requirements for breakdown voltage, significantly reducing the load on the high-voltage ignition coils. The side ground electrode is equipped with a platinum plate that effectively resists erosion wear under the influence of high-frequency electrical discharges.

Using a professional set of components ensures a qualitative improvement in the operational parameters of the internal combustion engine:

• Maximally fast propagation of the flame front from the center to the periphery of the combustion chamber, which contributes to the layered combustion of lean fuel mixtures.

• Stabilization of crankshaft revolutions in idle mode and elimination of ignition skips during abrupt throttle opening.

• Improvement of overall fuel economy by minimizing the number of atypical cycles of incomplete gasoline combustion.

Optimal combustion of the working mixture reduces the thermal load on the exhaust manifold and prevents premature clogging of the expensive catalytic converters' cellular structure.

Structural Protection Against Thermal Overload

The internal space between the metal body and the multilayer insulator is sealed with a special powder sealant that prevents gas breakthrough and maintains stable pressure in the cylinder. The metal surface is equipped with a three-component galvanic coating to prevent diffusion and sticking of the threaded part to the aluminum cylinder head during prolonged operation.

The implemented design solutions ensure the stability of the unit's parameters:

• Increased thermal conductivity due to the copper core, which quickly removes excess thermal energy from the combustion zone to the cooling circuit.

• Resistance of the ceramic shell to mechanical impacts during installation and exposure to aggressive chemical compounds.

• Reduction of radio interference level to protect sensitive on-board electronics blocks thanks to the built-in monolithic resistor.

Timely installation of the kit allows restoring the vehicle's passport power characteristics and prevents detonation destruction of the piston group.

Detailed Applicability Table for Eight-Cylinder V8 4.0L Engines

It is recommended to install the products exclusively on a cold engine with mandatory torque control using a calibrated torque tool.

Product Specifications

• Brand: NGK

• Brand Registration Country: Japan

• Material: iridium, platinum, metal, ceramic

• Size: thread diameter 12 mm, thread length 26.5 mm, hex size 14 mm

• Color: white, silver

• Weight: 344 g

• Condition: new

• Volume: set of 8 pcs

• Product Group: automotive parts, ignition system, spark plugs

• Purpose: ignition of the fuel-air mixture in internal combustion engines

• Compatibility: Audi A8 Quattro (2019-2020), Audi S8 (2020-2021), Audi SQ7 (2020-2022), Audi SQ8 (2020-2022), Porsche Cayenne (2019-2020), Porsche Panamera (2017-2023)

• Features: laser-welded electrodes, iridium central electrode, platinum insert on the side electrode, built-in noise suppression resistor

• Factory Part Number (MPN): SILZKGR8D7E

• Order Number (Stock Number): 96220

• Barcode (UPC): 087295862209

• Heat Rating: 8

• Thread Pitch: 1.25 mm

• Seating Type: flat with sealing washer

• Package Contents: 8 spark plugs in individual cardboard boxes, general transport packaging