GFB D Boost V2 VNT Manual Boost Controller (for VNT/VGT Turbos) Wheels_Wheel Nuts It features a center port

It features a center port that is used as a crankcase vent point

each rail is supplied with stainless steel -6 shouldered male fittings ready to connect to your braided fuel lines

GSC P-D Mitsubishi 4G63T Manganese Bronze Exhaust Valve Guide Stopper Style +

In other words

To fit all 4 door Subaru Impreza's from 2001 - 2007

GFB D Boost V2 VNT Manual Boost Controller (for VNT/VGT Turbos) Wheels_Wheel Nuts It features a center portRepeatable And Stable Boost Curve,100% Reliability, Zero Maintenance, Easy To Install In Minutes Easy To Adjust, Set and forget, Precision Needle Valve Bleed System, Manufactured In Australia In Accordance With ISO 9001