We won't be doing a recirculated wastegate for the kit, however the X57RS bolt on turbo upgrade will be capable of 415~ whp while spooling at 3,400 RPM. The 1st iteration x57R (Non RS - smaller turbine) produced 364 whp on UK petrol 99 RON which is equivalent of 95 octane so I would expect 400whp on ethanol. It's a product coming out in a month or so. Priced under $2k