Set of 6 iridium spark plugs NGK 97506 SILZKBR8D8S for BMW X6 N54 3.0L 135i 335i 535i E84 E89 F06 F06N

6pcs Iridium Spark Plugs Set NGK 97506 SILZKBR8D8S for BMW X6 N54 3.0L 135i 335i 535i E84 E89 F06 F06N

Premium Laser Iridium Performance for BMW Engines

The NGK 97506 (SILZKBR8D8S) iridium spark plug set is a high-tech solution specifically engineered for BMW six-cylinder turbocharged engines. The Laser Iridium series combines the use of precious metals—iridium and platinum—to provide exceptional wear resistance and spark stability. These spark plugs are the ideal choice for BMW owners looking to maintain factory power levels or for those operating vehicles with software tuning, where the demands on the ignition system significantly increase.

High Ignitability Technology and Longevity

The core of the spark plug is an ultra-fine center electrode with an iridium tip applied using laser welding technology. Iridium's high melting point allows the electrode to remain thin, which concentrates the electrical discharge and reduces the load on the ignition coils. The ground (side) electrode features a platinum inlay that minimizes electrical erosion and ensures the maintenance of a precise gap throughout the entire service life. A copper core integrated into the center electrode provides rapid heat dissipation, preventing overheating and reducing the risk of detonation in high-load N54 and N55 engines.

Electronics Protection and Structural Reliability

Each spark plug in the set is equipped with an integrated suppression resistor that protects sensitive onboard electronics and engine management systems from electromagnetic interference. The insulator, made of high-quality alumina silicate ceramic, features increased dielectric strength, completely eliminating the risk of flashover. The spark plug shell is protected by a special trivalent zinc coating that effectively resists corrosion and prevents the threads from seizing to the cylinder head, significantly simplifying future maintenance.

Detailed Compatibility with BMW Vehicles

This spark plug set is designed for a wide range of BMW models equipped with 3.0-liter turbocharged gasoline engines.

Technical Specifications

• Brand: NGK

• Brand Registration Country: Japan

• Material: Iridium, Platinum, Alumina Silicate Ceramic, Copper, Steel

• Size: Thread Diameter 12 mm, Thread Length 26.5 mm, Socket Size 14 mm

• Color: White, Silver Metallic

• Weight: 294 grams

• Gender: Unisex

• Condition: New

• Product Group: Ignition System Spare Parts

• Purpose: Air-fuel mixture ignition in turbocharged engines

• Compatibility: BMW N20, N26, N54, N55, S55, N63, S63 engines; 135i, 335i, 535i, 640i, M2, M3, M4, X5, X6, Z4 models

• Features: Iridium-tipped center electrode, Platinum inlay on the ground electrode, 5 kOhm resistor, High Ignitability technology

• Marking: SILZKBR8D8S

• Stock Number: 97506

• Heat Range: 8

• Thread Pitch: 1.25 mm

• Socket Type: Bi-Hex (12-point)

• Spark Gap: 0.8 mm

• Gasket Type: Flat washer

• Package Contents: Spark plugs — 6 pcs in individual and master packaging

• OEM Compatibility: 12120039664, 12120038896, 12120037580, 12120037582

• Recommended Tightening Torque: 15–25 Nm