Here ya go:
Dual .028 = 75hp - 15% = 63.75rwhp
dual .030 = 85hp - 15% = 72.25rwhp
dual .033 = 100hp - 15% = 85rwhp (mine came with one .032/.034)
dual .038 = 125hp - 15% = 106.25rwhp
So with these known NOS numbers we can see that every .001 jet size increase equals 2.5hp at the crank, .002=5hp and so on. Now we can do the math and get a close baseline rear wheel hp shot that we want. Every engine/car set-up is different, so the only way to get an absolute 100rwhp would be to jet it on a dyno. Hope this helps. In the beginning NOS did include the .038 jets, but...
(Posted by Robert56 on Ls1TECH.com)