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<p>The COBB 3" Focus RS Downpipe. This direct replacement for the factory downpipe features a 4.5" high flow GESi catalytic converter and 304 stainless steel tubing. The CNC Mandrel Bent tubing and 4" flex section ensures perfect OEM-like fitment. All of these features combine to provide a free flowing exhaust outlet for high energy exhaust gases to reduce turbo back pressure and increase turbo efficiency.<