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6.6L Duramax Diesel (L5P)

The torque monster. Tuning, maintenance, and exhaust discussion for the L5P Duramax and 10-speed Allison transmission.

205 topics in this forum

  1. Invisible trailer question

    By Michaellallen,   
    • 4 replies
    • 2k views

  2. Engine light on 2401 miles 1 2 3

    By Jnuehring,
    • 40 replies
    • 8.5k views

  3. 2020 Allison - oil can filter?

    By pw42,
    • 5 replies
    • 11.7k views

  4. Help buying new truck 1 2 3

    By Lfod1836,
    • 39 replies
    • 6.2k views

  5. Allison Transmission

    By Teach,
    • 0 replies
    • 2k views
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