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Ships within 48 hours · Estimated delivery Sep 11 - Sep 16
Built with high-carbon steel springs matched to exact corner weights
Lightened Flywheel Included - Reduces rotational mass for quicker revs and improved throttle response
OE-quality fitment and reliability
Improves shift feel and throttle response
HKS Hi-Power Cat Back Exhaust Single Exit Subaru WRX / STI 2015-2021 | 31006-BF003 Maxima_1989-1994 Built with high-carbon steel springsTransform 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
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