NGK 97506 Plugs are Suitable for BMW N20, N54, N55, and S55 Engines These are OE replacements for the N20 and S55, While providing a colder spark range better suited to tuned N54 and N55 Models.
Although these come pre-gapped to .030" we highly recommend double checking the plug gap upon receiving them and adjusting to your vehicle's individual needs. For the N54, these plugs are 2 Steps Colder, while for the N55 they are only 1 Step Colder.
