put one in my 2005 duramax and it made a big difference 6 liters per 100kms difference and the power is quite noticeable love it should have done it a long time ago.
i got out of the office this week got to go crawl around on a drag line it was kinda cool!! we sold them some line for the bucket!! it is 3 3/4" in diameter big fricken rope!! so i thought i would post a couple pics!!