HKS Hi Power Spec-L2 Exhaust for 2015+ WRX/STi (31019-AF130) Radium Below is a chart showing
Baker’s notes & crumb story
Description
HKS Hi Power Spec L2 Exhaust for 2015+ WRX STi (31019 AF130) Radium Below is a chart showing Below is a chart showing the free revving of a stock BRZ equipped with a stock pulley and then a GrimmSpeed pulley Please see notes if you have a 2018 WRX