NGK 97506 Spark Plug SetOften referred to as "2 Step Colder" plugs this set of NGK 97506 Spark Plugs is compatible with a wide variety of BMW motors and models and is the preferred plug for tuners as well as stock and high HP applications! A factory spark plug in N20 S55 engines, these plugs may be used in all of the following BMW motors: N20, N26, N54, N55, S55, N63, N63TU, S63, and S63TU. No gap tool? No worries! We offer these plugs pre gapped to the following: 0. 018",
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