Cobb's all-stainless cat-back exhaust features 3" mandrel-bent 340 stainless steel tubing, and a custom muffler that provides maximum flow while maintaining a reasonable sound level.  Superb craftsmanship makes for a long life and perfect fit.  It will install nicely with your stock downpipe, or with the Cobb downpipe if you'd like to upgrade later on.

Fits all 2002-2007 Subaru WRX and STI.