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so this is the better version of the other ST coil? ST = V1, ST XTA = V3, how does it perform better? Springs, valving, etc?
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Suzuki Swift GTI '89, Subaru Impreza L '96, Lancer OZ '03, Subaru Impreza WRX '06, Honda CBR600RR Graffiti, Volvo c30 T5 R '11, Subaru BRZ '13, Audi RS4 2007
SUV's: Mercedes Benz R500 '06, Mercedes Benz ML350 '12
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