7013-2 Champion Double Platinum Spark Plug.RS14PYP5. FITS Marine Applications: Flagship; 375 FEFI 496 CID, 375FEFI 454CID, 450FEFI 496CID, 500 FEFI 496CID 525FEFI 525CID, 575FEFI 520 CID, 600FEFI 535 CID . FITS MARINE APPLICATION INDMAR 4.6 MPI NORTHSTAR