Regardless of the vehicle or the application, you can bet that there is an ACDelco Spark Plug to do the job – and do it well. Whether you are choosing Professional or Specialty spark plugs, from our Iridium, Double Platinum, RAPIDFIRE single platinum, Conventional, Glow Plug, Marine, or Outdoor Power Equipment lines, you will know that you are getting a century’s worth of experience and know-how packed into that plug.