This turbo makes 270 to 300whp with good exhaust, Intercooler and intake. If you get higher, Its simply the dyno reading in comparison to another dyno. On 100 octane, I can get an easy 310 to 340whp depending on mods and if I can get the boost up to 25.
After that.. The turbo is done. The great benifit of this turbo is the cost, Its power on pump gas in comparison to the VFs and they spool really fast.