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NGK Iridium Stock Heat Range Spark Plug 15-20 WRX Grimmspeed Lightweight Battery Mount Kit 08-21 WRX / 08-21 STI Okada Projects Plasma Direct Coil Packs 15-20 WRX
15-17 WRX Direct Fit Plug 2 Year Odyssey Warranty the purchased through Defined Performance. Increases combustion