Powertrain

Engine, Drivetrain, Exhaust, Clutch, etc

  1. N/A Mods & Tuning

    Questions, Comments, Problems, etc about drivetrain modification issues.
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    52,088
    Nashman Latest: How to upgrade your diff Nashman, Dec 4, 2018
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  2. F/I Mods & Tuning

    Discussion Turbochargers, Superchargers, NOS and general FI issues.
    2,049
    47,252
    K2 Latest: TRD Supercharger Maintenance?? K2, Feb 1, 2019
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  3. Fluids & Maintenance

    Oil, Filters, Transmission Fluid, Brake Fluid, etc.
    531
    7,101
    XMPLRY808 Latest: Trans cooler XMPLRY808, Aug 27, 2018
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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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