NGK Laser Iridium Spark Plugs BMW B48 / B58 Engines Heat Range 8

NGK Laser Iridium Spark Plugs for BMW B48 and B58 Engines (SILZKGR8B8S)

The NGK Laser Iridium SILZKGR8B8S (NGK stock number 94201) is made for BMW's turbocharged B48 four-cylinder and B58 six-cylinder engines. With a cold heat range of 8, it suits both factory cars and tuned builds, including higher boost, E85, water/methanol injection and upgraded turbo setups.

A fine-wire iridium centre electrode and a platinum-tipped ground electrode give a strong, consistent spark and a slow wear rate, so idle stays stable and ignition stays reliable under load.

Key Features

• Fine-wire iridium-tipped centre electrode
• Platinum-tipped ground electrode for long service life
• Cold heat range 8 for factory and tuned B48 / B58 engines
• Pure alumina silicate ceramic insulator for strength and heat transfer
• Copper core helps carry heat away from the tip
• Trivalent metal plating resists corrosion and thread seizing
• Corrugated ribs help prevent flashover
• Triple seals prevent combustion gas leakage

Which set do I need?

• Set of 4: B48 four-cylinder engines (for example 120i, 220i, 230i, 320i, 330i, 420i, 430i, 520i, 530i)
• Set of 6: B58 six-cylinder engines (for example M140i, M240i, 340i, M340i, 440i, M440i, 540i, 740i, X3 M40i, X4 M40i)

Tuned engines: a gap of 0.56mm to 0.58mm (0.022" to 0.023") is recommended for tuned engines. Check the gap before fitting and follow your tuner's advice.

Vehicle fitment is listed in the tabs above. These plugs suit B48 and B58 engines only, so earlier cars with N13, N20 or N55 engines need a different plug. Not sure what your car has? Contact our team at sales@chicaneaustralia.com.au.