If you're looking to make over 600HP then the Steamspeed STX 76R Turbocharger makes for an excellent candidate. The STX 76R is a ball bearing turbocharger that utilizes a universal style T3 turbine housing inlet along with a v-band exit. This means that you can integrate it with any T3 based turbo kits along with custom turbo builds.
The Steamspeed STX 76R features their proprietary STX wheel aerodynamics and have proven to flow more and make more power than similarly sized turbos like the Garret GTX models, and the Borg Warner EFR series. The compressor wheel on this turbocharger features a third geometry which allows the ceramic ball bearing CHRA to efficiently make power even at high boost levels.
This turbocharger will come with all the required accessories which include the fittings, lines, gasket, v-band, and the rest of the hardware to make it ready for the installation. Comes with a 3 inch inlet, along with a v-band exit with a 0.73 A/R hotside.