HKS Hipermax S Coilover Kit Subaru WRX / STI 2015-2021 | 80300-AF009P GolfR_2016-2018 BC valve springs are wound

BC valve springs are wound from only the highest grade

They are hand down the largest automotive/ motorcycle suspension company

Pre-Oiled and Re-usable Dual Cone Air Filter

It picks up the signal from your stock O2 sensor and displays the reading instantly on the Gauge

HKS Hipermax S Coilover Kit Subaru WRX / STI 2015-2021 | 80300-AF009P GolfR_2016-2018 BC valve springs are woundOVERVIEW: Introducing the HKS Hipermax S Coilovers tailored for the 2015 2021 WRX STI. Nine years after the debut of the MAXIV GT, the HIPERMAX S series emerges, setting a new benchmark for "Driving Comfort" by enhancing damping force, durability, and aesthetics. Beyond conventional ride comfort and handling prowess, the focus shifts towards a holistic notion of "Driving Comfort," prioritizing both ride ease and the confidence instilled by superior