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  • BMW M2, M3, M4, M5, M6 (F-Chassis) Block Disc Set – 100% Lock for Drifting & Drag Racing

    RD6011

    BMW M2 / M3 / M4 / M5 / M6 (F-Chassis) — Block Disc Set for Electronic LSD (100% Lock)

    For hardcore drifters and drag racers, nothing beats the instant power delivery of a fully locked differential. BMW F-chassis M cars use an electronically controlled rear LSD that cannot be welded. The RacingDiffs Block Disc Set converts your e-LSD into a permanently locked unit—delivering a welded-diff feel without permanent modifications.

    If you prefer to keep LSD behavior with more mechanical bite, check our Evo-Hybrid LSD Upgrade.

    Why Choose the Block Disc Set
    • 100% lock — no slip, no delay: Both wheels receive equal torque at all times for maximum traction.
    • The only alternative to welding: Factory e-LSD is not weldable; this is the true route to a fully locked setup.
    • Fully reversible: Remove the discs to restore factory operation if needed.
    • Zero maintenance: No special clutch oils or periodic service required beyond normal diff checks.
    • Built for abuse: Optimized for high-horsepower builds, hard launches, and clutch-kick drifting.
    What’s in the Box
    • Block discs (replace the OEM clutch packs to force permanent lock).
    • Differential collar (application-specific interface component).
    • High-quality bearing for reliable long-term operation.

    Note: Carrier bearings, seals, shim packs, and fluids are not included—inspect/replace as needed during installation.

    Technical Specs / Installation Tips
    Diff family BMW F-chassis M rear electronic LSD (e-LSD).
    Function Replaces clutch stacks to create permanent 100% lock at the rear axle.
    Setup notes Check carrier bearings & races; set preload/backlash per BMW procedure; verify tooth contact pattern after assembly.
    Fluids Use a high-quality gear oil suitable for locked differentials; change after initial heat cycle.
    Street NVH Expect increased low-speed tire scrub and NVH with 100% lock; intended primarily for motorsport/off-highway use.


    Fitment

    BMW M2 / M3 / M4 / M5 / M6 with F-chassis electronic rear LSD (e.g., F87 M2, F80/F82/F83 M3/M4, F10 M5, F12/F13 M6). If unsure, send us your VIN and we’ll confirm compatibility.

    Need total lock with welded-diff response—minus the welding? This is the ultimate BMW F/G-chassis M e-LSD upgrade for drift and drag applications.