2008 2014 Subaru Impreza WRX STI Sedan T 304 Stainless Steel Dual Invidia Full Titanium Cat Back Exhaust Subaru WRX STI Hatchback 08 14 Invidia 15+ Subaru WRX STI 4Dr Q300 Twin Outlet Rolled Stainless Steel R1 Spec Full Titanium Catback Exhaust Subaru WRX STI VA [2015 21. Upgrade your Subaru Impreza STI with a high performance valved catback exhaust system from ValvedExhausts. Designed for maximum flow and increased power, this premium catback features an adjustable valve for customizable sound levels. Unleash the full potential of your STI and experience a smoother, more responsive ride. Fitment 2008 2021 Subaru Impreza STI WRX This kit includes a catback exhaust system with clamps hardware, valved exhaust tips, one valved exhausts remote, one remote receiver, and all necessary vacuum lines. Use our discount coupon code "M3Parts" to save on the entire ValvedExhausts website at checkout!