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Old 09-11-2020, 02:04 PM   #1
GothamDrew
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Member#: 503624
Join Date: Jun 2019
Default Cobb Catback Exhaust adding 20hp at 4k RPM?

Hi all, reading through the article below, it says that they manged to get some significant hp gains on a Subaru STI just from the Cobb catback exhaust throughout the dyno graph and around 20hp at 4k rpm. Does anyone know if this is accurate and achievable on a stock STI? I was under the impression catback exhausts on a stock STI doesn't really add any gains and only improves sound. Thanks!

https://dsportmag.com/the-tech/showc...-back-exhaust/
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