HKS Super Fire Racing M45I Spark Plug (NGK9) WRX Factory O2 sensor locations are

Factory O2 sensor locations are also retained to ensure compatibility with factory systems

Flanged fill neck for 1

Aluminium suction pipe replaces stock flexible rubber hose

but acceptable

24" (flycut)

HKS Super Fire Racing M45I Spark Plug (NGK9) WRX Factory O2 sensor locations areHKS Super Fire Racing M Series spark plugs are built for high output and tuned engines that need stable ignition under heat and high rpm. An iridium alloy centre electrode paired with a platinum tipped ground electrode produces a fine, durable spark with strong wear resistance, so ignition stays consistent under boost and sustained load. Features Iridium alloy centre electrode and platinum ground electrode for a strong, stable spark High resistance to