Scooby Newbie: WRX Stage Packages

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Jan 11, 2003 | 08:38 PM
  #3  
Drew, the most restrictive part on the stock WRX exhaust system is the muffler so getting a catback exhaust will give you a pretty good HP/TQ increase.

http://www.turbomagazine.com/tech/0212tur_exhaust/
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