APEXi A'PEXi - Power FC - 1998-2000 Subaru Impreza WRX / STi (GC8 Ver. 5 / 6) Turbo Install many builders go with ARP

many builders go with ARP hardware for reliability under boost

Package Includes 1x Rear Bumper Diffuser W/ Brake Light

UV-stable material

Smoke Lens – Darkened finish for modern look without sacrificing visibility

Whether you use sealant depends on your header's sealing surface condition — clean mating surfaces alone often seal fine with a fresh aluminum gasket

APEXi A'PEXi - Power FC - 1998-2000 Subaru Impreza WRX / STi (GC8 Ver. 5 / 6) Turbo Install many builders go with ARPAPEXi Power FC Complete Standalone Engine Management The APEXi Power FC is the ultimate solution for those seeking to break free from the limitations of traditional piggyback style fuel controllers. Designed as a full standalone ECU, the Power FC replaces the factory ECU to provide total control over engine management, making it ideal for high performance, track, and race applications. From multi point fuel and ignition control to VTEC engagement