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The Concave Flow Digressive Piston allows for a Jekyll and Hyde personality
they deliver improved traction
Shop now and feel the difference
more precise engine engagement
Perrin Front Mount Intercooler w/ Boost Tube Piping Kit 2015-2021 STI YMM_2008_2014_Subaru_Impreza_WRX_STI_GR_Hatch The Concave Flow Digressive PistonPerrin Front Mount Intercooler w Boost Tube Piping Kit 2015 2021 STI 3 8" Bar & Plate Core Front Mount Intercooler Kit Overview The Perrin Front Mount Intercooler (FMIC) with Boost Tube Piping Kit is designed specifically for the 2015 2021 Subaru WRX STI to replace the factory top mount intercooler. This upgrade addresses the common issue of heat soak and restrictive airflow in the stock intercooler, delivering significantly cooler intake charge
