BRISK Silver Racing RR12S Spark Plug
14mm thread, 25mm reach, 5/8'(16mm) hex, tapered seat, non-projected tip, resistor, fine wire 1.5mm Silver center el., Cut-back ground electrode
6.1L Hemi SRT
Two step colder:
RR12S (non-projected tip) – High Compression, Forced Induction and/or Nitrous
QTY: 16