360 should be fine on an STI lump, the failure level increases as you up the power and depends on the quality of the mapping, my engine let go at 370bhp but this was probably due to poor fuel and/or oil starvation due to not having a baffled sump.
350 starts testing the limits of the gearbox though!
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2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter
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