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Old 09-17-2020, 02:38 PM   #5
Scooby Newbie
Member#: 477013
Join Date: Nov 2017
Location: Massachusetts
2019 STI Limited
Ice Silver Metallic

According to the article above they tested 12 different exhaust systems on the same dyno, same exact sti. Could it be possible some cat back systems do increase power?
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