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Forum: Duramax Diesel Performance Shop

What's it take to make big power? Tips on Duramax diesel performance products, improving fuel economy, power upgrades, exhaust systems, and programming. From a little to a lot, find out what it takes. Post a question or offer your advice.

  1. Arrow Sticky Thread Sticky: Magnuson-Moss Warranty Act

    Started by More Power, 08-13-2007 15:07
    • Replies: 7
    • Views: 11,943
    10-25-2007, 10:51 Go to last post
  1. Kennedy Custom Tunes MPG Gains for LLY's?

    Started by mjammer, 03-18-2008 10:36
    3 Pages
    1 2 3
    • Replies: 52
    • Views: 30,695
    06-07-2011, 07:34 Go to last post
  2. deciding between 4 or 5 inch exhaust

    Started by lmholmes11, 09-27-2012 06:20
    • Replies: 8
    • Views: 28,215
    02-21-2018, 11:36 Go to last post
  3. `06 LBZ improvement, MPG and power

    Started by pete m, 01-17-2010 10:11
    3 Pages
    1 2 3
    • Replies: 43
    • Views: 27,730
    03-24-2010, 06:50 Go to last post
    • Replies: 6
    • Views: 25,873
    08-27-2007, 07:52 Go to last post
  4. Three LBZ tow tune comparison

    Started by Mark Rinker, 02-23-2009 11:15
    3 Pages
    1 2 3
    • Replies: 40
    • Views: 23,409
    04-08-2009, 13:47 Go to last post
  5. Trans Problems when Towing

    Started by Aepozzi, 08-05-2012 22:03
    2 Pages
    1 2
    • Replies: 24
    • Views: 19,768
    02-14-2013, 09:18 Go to last post
  6. Heads up for California Diesel owners

    Started by Philsauto, 04-19-2009 21:30
    2 Pages
    1 2
    • Replies: 21
    • Views: 17,584
    02-22-2012, 18:47 Go to last post
  7. Banks or AFE Cold Air Intake?

    Started by Londell, 02-12-2007 15:29
    • Replies: 9
    • Views: 16,813
    03-31-2007, 18:21 Go to last post
  8. Unhappy 2003 LB7 KD Mega Filter

    Started by PoppaWilley, 07-11-2012 20:25
    • Replies: 11
    • Views: 15,002
    03-30-2015, 07:09 Go to last post
  9. Question Banks Ram Air Kit - The Good and the Bad

    Started by DIESELMAX403, 06-26-2006 11:36
    • Replies: 10
    • Views: 14,856
    09-11-2006, 10:43 Go to last post
  10. EGT temps on 05 LLY

    Started by REDTRUCK05, 07-06-2006 21:44
    • Replies: 12
    • Views: 14,152
    08-26-2006, 20:35 Go to last post
  11. after market exhaust

    Started by weldinfool, 04-18-2006 13:33
    2 Pages
    1 2
    • Replies: 30
    • Views: 13,410
    07-26-2007, 15:54 Go to last post
  12. GM Watching Your ECM

    Started by rmchowchow, 05-20-2008 19:38
    • Replies: 15
    • Views: 12,090
    06-25-2011, 03:55 Go to last post
  13. Duramax reaches 1000HP on fuel only

    Started by Bobo, 01-27-2007 23:27
    • Replies: 10
    • Views: 11,996
    02-05-2007, 12:21 Go to last post
  14. LLY Owners with Boost Stick--MPG'S

    Started by 6.6Turbo, 11-20-2007 14:21
    • Replies: 8
    • Views: 11,962
    01-16-2008, 19:39 Go to last post
    • Replies: 5
    • Views: 11,702
    06-21-2012, 13:55 Go to last post
  15. industrial injection turbos lb7

    Started by linchhummmer, 01-11-2008 15:56
    2 Pages
    1 2
    • Replies: 26
    • Views: 11,518
    02-25-2011, 11:34 Go to last post
  16. Question Dual CP-3

    Started by More Power, 01-20-2007 15:24
    2 Pages
    1 2
    • Replies: 36
    • Views: 10,938
    06-04-2007, 08:17 Go to last post
  17. PPE Boost Valve vs. Kennedy Boost Valve

    Started by paoutdoorsman, 12-22-2006 13:16
    • Replies: 8
    • Views: 10,364
    12-23-2006, 09:37 Go to last post
  18. traction bars

    Started by maverick_935, 01-21-2012 13:36
    • Replies: 8
    • Views: 10,349
    07-30-2014, 14:05 Go to last post

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