Home > Subaru > STI 2004-2007 > Ignition Systems
Sort By:
Page of 1
NGK Stock Heat Range Iridium Spark Plugs 06-14 WRX / 04-17 STI NGK 2309 1 Step Colder Iridium Spark Plug 06-14 WRX / 04-16 STI Subrau Ignition Systems
Set of 4 Plugs Ideal for increased boost. Compatible with all OEM components
Compatible with OBD-II (On-Board-Diagnostics)