BigDan, trust me it is quicker. More noticeably on the street. Tires/tire breaking loose much easier than before. Unfortunately, I, like a lot of us, tend to do things in batches therefore not establishing quantifiable base lines. Now having said that, just with a turbo change (35/40 to a DodgeZilla 35/40) and the addition of a CaTCHER, my times have improved by about . 75 of a second. But different tracks same elevation though. BTW, CaTCHER does not give up anything on the top end either. Ran a so so ET but best ever MPH at Spokane, WA three weeks ago and track elevation was bout 2600' verses sea level of the other two tracks. I blame ET on me, the driver, not the truck!
Roger