NGK 97506 SILZKBR8D8S N55 Iridium Spark plugs

The NGK SILZKBR8D8S are heat range 8, one step colder for the N55 and N20, 2 step colder for the N54.
They are standard heat range for the N63 ans S63.

Don't wait until you start having missfires with your modded N55/N55, upgrade to a better plug now.

Sold by the unit or in pack