I'd put it in the 300whp range with a Hahn Stage 3 with a 20G.....Star probably a weee bit high just because the turbo flows a little more than a 20g, maybe 325whp or so.....just a guess however!
with a built bottom end can a 420a handle as much as a 5g63?You said around 300whp but alot of 4g63 guy have more than that.whats the max boost and hp a 4g63 can handle?