Powertrain

Engine, Drivetrain, Exhaust, Clutch, etc

  1. N/A Mods & Tuning

    Questions, Comments, Problems, etc about drivetrain modification issues.
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    52,115
    *IrunnIt* Latest: Clutch Masters Hydraulic Throw Out Bearing Group Buy *IrunnIt*, Jan 4, 2020
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  2. F/I Mods & Tuning

    Discussion Turbochargers, Superchargers, NOS and general FI issues.
    2,057
    47,334
    joshxrmora Latest: Looking for advice. joshxrmora, Mar 5, 2020
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  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
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    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!

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