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Well, they have been running the STi six speed in RALLY situations in the SCCA ProRally. They have been pumping 26PSi of boost into the engine- and guess what- the tranny is holding up!

They said that that equals ~380HP, and that it could probably take up to 29PSi of boost. This was all in an article from the December of January Grassroots Motorsports..

Unlike the WRX 5-speed, the STi 6-speed is pretty beefy. :smile:

The upgrades that I plan on doing in the long run include: programmable engine management, exhaust, ball-bearing turbo..

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