The AVO 3" catted race downpipe for the 02-07 WRX/STi is constructed from high-grade stainless steel, ensuring longevity along with great looks. It also features a special cast iron outlet which incorporates a splitter to deflect wastegate gases thereby improving turbo spool up & reducing air turbulence. The high-temp cast outlet removes a major bottleneck present on the factory exhaust system with its large bellmouth design with splitter for the wastegate. A stock exhaust flange simply has a blank plate at the wastegate, putting a major lid on performance.
The factory WRX/STi down pipe also uses two fairly restrictive catalytic converters. The AVO downpipe addresses this issue with a single large high-flow metal catalytic converter, larger than available from most other makers. All this adds up to a huge decrease in back pressure and a big increase in performance. Use your turbo to its full potential!
Note: Includes both gaskets, hardware and an adapter to bolt this downpipe to a stock catback (if needed).