HKS Hi-Power Cat Back Exhaust Single Exit Subaru WRX / STI 2015-2021 | 31006-BF003 10 Standard valves crack with age

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

Seeing the need for stronger end links during hours of track testing

Advanced Fuel Control with User-Friendly Interface

Inspired by GT-R50 concept heritage

Single Walled Tip with Laser Engraved Logo

HKS Hi-Power Cat Back Exhaust Single Exit Subaru WRX / STI 2015-2021 | 31006-BF003 10 Standard valves crack with ageTransform 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