HKS Hi-Power Cat Back Exhaust Single Exit Subaru WRX / STI 2015-2021 | 31006-BF003 10 Vehicle-specific fitment – not a

Vehicle-specific fitment – not a generic or universal kit

Standard valves crack with age and heat cycling and rely on rubber diaphragms that perish

We use 50% more urethane then all out competitors

Manufactured with high-quality materials in the USA

HKS Hi-Power Cat Back Exhaust Single Exit Subaru WRX / STI 2015-2021 | 31006-BF003 10 Vehicle-specific fitment – not aTransform the sound, appearance, and performance of your Subaru with the HKS Hi Power Single Exit Cat Back Exhaust System. Designed specifically for the 2015 2021 WRX and STI, this premium exhaust replaces the factory quad tip setup with an aggressive single exit configuration featuring an 85mm main pipe and race inspired muffler design. Constructed from high quality SUH409 coated steel and SUS304 stainless steel, the Hi Power exhaust reduces back