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Anon Admin (not verified)    June 22, 2023 - 2:23PM

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I have a 2020 Sti. it also has beefed up internals and is under boosted. I've had boost spikes as high as 18 psi, but it usually stays around 15psi. An instake, exhaust, downpipe and an ots cob tune gives it an extra 50 hp. remove the downpipe and you still get 20-30. Problem is, like with all Subaru's, you're gonna blow a head gasket eventually.

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