Powertrain

Engine, Drivetrain, Exhaust, Clutch, etc

  1. N/A Mods & Tuning

    Questions, Comments, Problems, etc about drivetrain modification issues.
    3,268
    52,098
    Gadget Latest: PROBLEMS with URD!! Gadget, May 28, 2019
    RSS

  2. F/I Mods & Tuning

    Discussion Turbochargers, Superchargers, NOS and general FI issues.
    2,054
    47,288
    BillDaCat Latest: Kelford cams Group buy BillDaCat, Jul 15, 2019
    RSS

  3. Fluids & Maintenance

    Oil, Filters, Transmission Fluid, Brake Fluid, etc.
    533
    7,111
    blu xr Latest: Great engine oil article from GRM blu xr, May 17, 2019
    RSS
Toggle Width

  • About Us

    XR-Underground is a dedicated community of Toyota X-Runner enthusiasts that was launched in January 2007. X-Runner Underground.com, referred to as XRU by our regular members, offers an active discussion forum, group events, specialty merchandise, a welcoming community of owners and the most information you can find about the Toyota X-Runner on the internet!

  • Quick Navigation

    Open the Quick Navigation

  • Like us on Facebook

    X-Runner Underground

  • Your donations keep XRU going

    XRU is a forum for the users, by the users. We receive very limited funding from vendors so we really rely on donations to cover our operating costs and to provide products and giveaways at events. Every dollar helps!

    If you are able to donate, we'd really appreciate your help.