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    • RK Autowerks developing BMW N63/S63 4.4 Garett G25-660 based bolt in turbo upgrade good for 1000+ hp

      This sure is interesting as RK Autowerks states the turbo upgrade will apply to either N63 or S63 based 4.4 liter BMW engines. Considering the Garett G25-660 turbos can support north of 1000 horsepower, that opens up a lot of BMW models to some serious aftermarket power.


      RK Autowerks states they will have a G30-900 version as well but here are the G25-660 specs:

      Horsepower: 350 - 660
      Displacement: 1.4L - 3.0L

      • G SERIES COMPRESSOR AERODYNAMICS FOR MAXIMUM HP
      • G SERIES TURBINE WHEEL AERO WITH IMPROVED EFFICIENCY
      • 54mm TURBOCHARGER COMPRESSOR OPTION
      • STANDARD AND REVERSE ROTATION CONFIGURATIONS
      • TURBINE WHEEL CONSTRUCTED OF MAR-M ALLOY RATED UP TO 1050C
      • STAINLESS STEEL TURBINE HOUSING OPTIONS RATED UP TO 1050C
      • FULLY MACHINED SPEED SENSOR AND PRESSURE PORTS
      • OIL RESTRICTOR AND WATER FITTINGS INCLUDED

      Yep, a pair of these should make some big numbers but you will need a built motor and upgraded fuel system to take advantage of them.


      Is the N63 suddenly set to become a BMW powerhouse and tuning value? We will see.

      Quote Originally Posted by RK Autowerks
      G25-660 bolt on solution for the 63 series engine. Stay tuned for development! This setup will work on any twin turbo v8 bmw. Will also have an external wastegate g30-900 option as well coming up.
      Pricing is expected to be between $7-9k.


      This article was originally published in forum thread: RK Autowerks developing BMW N63/S63 4.4 Garett G25-660 based bolt in turbo upgrade good for 1000+ hp started by Sticky View original post
      Comments 5 Comments
      1. M5Dan's Avatar
        M5Dan -
        Raza of RK Autowerks does great work.
      1. rileyg's Avatar
        rileyg -
        Nice. This will be pretty sweet.
      1. Sticky's Avatar
        Sticky -
        Just want to see how this does on the N63.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge
      1. Payam@BMS's Avatar
        Payam@BMS -
        ^ looks like an F90 M5 engine.