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10-24-2015, 06:09 PM
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#1 |
  Drives: 2013 Yaris Hatchback L Join Date: May 2013
Location: Newark NJ
Posts: 229
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From memory the stock inner diameter is 2" from the header to the reasonator, then it narrows to 1.8 or so inches. The 2.25" cat back will definitely give an improvement(throttle response, sound,looks), power wise its a toss up.
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