Nameless Catback Exhaust - Fits 2019-2021 Subaru STI Muffler Style:4" Mufflers GSC Power-Division's new valves are

GSC Power-Division's new valves are sure to become the industry standard for sport compact performance valves

Center-split core casting provides proper heat transfer and thermal efficiency

Designed with vents to allow for increased rotor cooling

International GT Open

Nameless Catback Exhaust - Fits 2019-2021 Subaru STI Muffler Style:4" Mufflers GSC Power-Division's new valves areLevel Up: The launch of our new catback exhaust for the 2015 Subaru WRX is here! We have a system configured to suit the new models perfectly*, with an all new design from the mid pipe to the axle back. Built by enthusiasts, for enthusiasts, our designs are second to none, starting as raw materials in one door of our shop and shipping out as finished handcrafted parts at the other end of the building. You won't find a better value for money. Features: