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NGK Stock Heat Range Iridium Spark Plugs 02-05 WRX NGK 1 Step Colder Iridium Spark Plugs 02-05 WRX NGK Stock Heat Range Iridium Spark Plugs 06-14 WRX / 04-17 STI
Set of 4 plugs Set of 4 plugs Set of 4 Plugs
Subrau Ignition Systems
Compatible with all OEM components
Compatible with OBD-II (On-Board-Diagnostics)