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Our Decat Downpipe compatible with the Subaru Impreza New Age replaces the standard restrictive downpipe and catalytic converters with a stainless steel, one-piece item. Increasing the bore of the downpipe and replacing the restrictive catalytic converters allows the exhaust gasses to flow much more freely, increasing the power output of the engine.Features:Manufactured from T304 stainless steel3" bore (also available with 2.5" outlet)TIG welded, CNC machined flangesBoss fitted to accept O2 (lambda) sensorsGaskets included