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The F38 has a 38mm valve
5" Stainless Steel (88
Audi S3 IHI IS38 Turbocharger
Easy-to-install Plug & Play harness and sensor included
Perrin Equal Length Header - Subaru WRX/STi Earl's The F38 has a 38mmVehicle Fitment: 2002 2014 Subaru WRX 2004 2018 Subaru STi Description: Create a smooth sounding exhaust note while increasing horsepower and torque with the PERRIN E4 Series Big Tube Equal Length Header. The new PERRIN E4 Series Big Tube Equal Length Header comes with collectors that have been designed for better exhaust flow while allowing the headers to be constructed much more accurately. The improved exhaust flow and more precise construction
