HKS Hi-Power Cat Back Exhaust Single Exit Subaru WRX / STI 2015-2021 | 31006-BF003 Maxima_1989-1994 Requires Process West Verticooler system

Requires Process West Verticooler system

ensuring proper refrigerant flow and effective heat exchange while maintaining compatibility with factory mounting points and existing hardware

Failure to do so may result in damage to your vehicle

Hi-tuck design for improved ground clearance

this system improves airflow into the EJ engine for better performance and throttle response

HKS Hi-Power Cat Back Exhaust Single Exit Subaru WRX / STI 2015-2021 | 31006-BF003 Maxima_1989-1994 Requires Process West Verticooler systemTransform 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