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A custom conical cloth filter connects to a CFD-designed velocity stack and airflow straightener grid
and 2012-2017 Crosstrek models
and sharper throttle response
Perfect for road racing and asphalt circle track use
HKS Hi-Power Catback Exhaust 2015-2021 WRX / 2015-2021 STI Promo2500 A custom conical cloth filterEnhance your 2015 2021 Subaru WRX or WRX STIs performance and sound with the HKS Hi Power Catback Exhaust. Designed for enthusiasts seeking a refined yet aggressive exhaust note, this system delivers a clean, low frequency tone by eliminating resonance through its built in resonance pipe. Crafted to improve airflow, it boosts your driving experience while maintaining street friendly sound levels around 90dB. Constructed from durable 304 stainless
