Spark Plug Denso IXU27

Iridium Spark Plug for Sea-Doo 4-Tec Race upgrade Iridium Spark Plug for Sea-Doo 4-Tec Denso Spark Plugs are the superior plug for the Sea Doo 4-tec engine and take the place of the DCPR8E NGK originals. Iridium plugs offer better idle and add RPM’s with better fuel burn. Always lube the threads when installing new spark plugs with engine oil from the dip stick.