62mm is making about 580-590whp on a dynojet, 58mm I think was about 560whp. There is still more in both turbos but the Tranny is limited. There is a little more lag with the 62mm, and still more testing to be done. I would stick with the 58mm until there is a way to upgrade the tranny and up the rev limit. It is insane fast you will love the 58mm. Hopefully Cupertino Steve chimes in he has a 58mm.
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