Set of NGK Laser Iridium Spark Plugs SILZKBR8D8S 97506 for BMW 2.0/3.0/4.0/4.4, set of 8 pcs

Set of 8 pcs NGK Laser Iridium SILZKBR8D8S 97506 Iridium Spark Plugs for BMW 2.0/3.0/4.0/4.4

Technological Excellence of the Laser Iridium Series

NGK 97506 (marked SILZKBR8D8S) spark plugs are a high-tech, premium-class ignition system component designed specifically for modern high-performance BMW engines. The main advantage of this series is the use of iridium for the center electrode tip. Iridium features exceptional hardness and an ultra-high melting point, which allowed engineers to make the electrode as thin as possible. This solution provides a powerful and stable spark at lower voltages, which is critical for the consistent operation of turbocharged and direct-injection engines.

Design Features and Durability

These spark plugs utilize laser welding technology for the electrodes, guaranteeing reliable connections even under extreme thermal cycles. The ground electrode is reinforced with a platinum chip, which minimizes electrical erosion and prevents the expansion of the spark gap throughout the entire service interval. High-quality ceramic insulation effectively prevents flashover and ensures proper heat dissipation. The spark plug shell is protected by a special anti-corrosive coating that prevents the threads from seizing to the cylinder head.

Operational Benefits for BMW Owners

Using the original NGK 97506 set allows for the full realization of the vehicle's dynamic potential. Efficient and complete fuel combustion contributes to a stable idle, instantaneous throttle response, and reduced fuel consumption. The presence of a built-in interference suppression resistor ensures no radio interference with onboard electronics, audio systems, and sensors. These spark plugs are the benchmark choice for N20, N55, S55, N63, S63, and N74 engine series, ensuring factory power and environmental parameters.

Detailed Compatibility with BMW Vehicles

This list includes models that utilize the corresponding engine modifications.

Technical Specifications

• Brand: NGK

• Brand Registration Country: Japan

• Material: Iridium, platinum, ceramic, steel

• Size: Thread M12 x 1.25, thread length 26.5 mm, hex size 14 mm (12-point)

• Color: White, silver

• Weight: 390 grams

• Gender: Unisex

• Condition: new

• Product Group: Spark plugs

• Purpose: Ignition of the air-fuel mixture in engine cylinders

• Compatibility: BMW 135i, 228i, 320i, 328i, 335i, 428i, 435i, 528i, 535i, 550i, 640i, 650i, 740i, 750i, M2, M3, M4, M5, M6, X1, X3, X4, X5, X6, Z4 (2010-2021)

• Features: Extended insulator, iridium tip, laser assembly technology, interference suppression resistor

• Spark Plug Type: Laser Iridium

• Gap: 0.8 mm

• Heat Range: 8

• Gasket Type: Flat washer

• Thread Pitch: 1.25 mm

• Quantity in Set: 8 pieces

• Equipment: 8 spark plugs in individual and master cardboard packaging