HKS Racing Muffler Exhaust - '11-14 Subaru Impreza WRX / STi (31008-BF003)
HKS Titanium Racing Muffler Exhaust - 02-07 Subaru Impreza STI For high horsepower range applications, HKS now offers the Racing Muffler system. Constructed of high-luster polished SUS304 stainless...
HKS Super Turbo Muffler Exhaust - 02-07 Subaru Impreza STI Specifically engineered for turbo applications that require greater flow capacity than naturally aspirated applications, Turbo...
Voltex Rear Undertray - 04-07 Subaru Impreza WRX / STi Made from a combination of high quality FRP and Carbon, the voltex rear diffuser directs airflow from the rear.