The NGK 97506 (SILZKBR8D8S) Laser Iridium Spark Plugs are 2-step colder for N54 and N20 engines and 1-step colder for N55 and S55 engines. They suggested for higher boost E85, water/meth injection, and/or upgraded turbocharger applications across all late model turbo BMW models. 

It is recommended to gap these plugs to 0.022-0.023" for all tuned N20, N54, N55, S55, N63, N63TU, S63, and S63TU applications. 

Please contact us if you have any questions about the suitability of these plugs for your BMW model.

Running colder spark plugs will not necessarily increase power but they may restore power if the current plugs are old and worn. Colder spark plugs are more efficient at transferring heat away from the tips of the spark plugs. Lower horsepower engines will not create as much heat, so these spark plugs may not work as effectively as the OEM option under 450whp, or they will require replacement sooner. The reason behind that is that the spark plug tips stay too cool and become less effective at burning carbon deposits off the tip of the plugs. However, keeping the spark plug tips cooler is essential for preventing misfires in higher horsepower engines.

NGK Laser Iridium spark plugs provide superior ignitability and long service life. Fine wire iridium tipped centre electrode and fine wire platinum tipped ground electrode ensures slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions.

Beware of counterfeit NGK plugs being sold at a cheaper price by other vendors. They do not offer the same performance, lifespan, and knock resistance. 

Walk-in purchases for this product are not available. If you would like to order a spark plug set and pick it up from our office, please process your order online and select the 'Click & Collect' option. We will then notify you when your order is ready for collection.