1. R

    Single turbo Doc Race Motiv boost box and mac solenoid (MHD)

    Hey guys I´m new on the page, I am on the procces of making my 135i n54 09 to doc race st 6266, i have doubts about how the motiv boost box works with the mhd, and how is connected the mac solenoid to the wastegates So how do I use the MHD to control the Motiv Boost Box or does it control...
  2. Rob09msport

    Thoughts on wth I need to fix now

    I am fbo with inlets outlets fully catless walnut blasted 5k ago new injectors and plugs 15k on hpfp and turbos and now my wgdc is high. Could this be boost solenoid aka pressure converter I changed one 10k miles ago because was...